doc: update external links based on redirects, fix/remove dead links

- checked with python -m sphinx -b linkcheck -c doc doc/md doc/linkcheck

doc/md/Community-and-related-software.md

@@ -19,7 +19,7 @@ See [REST API](REST-API.md) for a list of official and community clients.
 - [disqus](https://github.com/kalvn/shaarli-plugin-disqus) by [@kalvn](https://github.com/kalvn): Adds Disqus comment system to your Shaarli.
 - [emojione](https://github.com/immanuelfodor/emojione) by [@immanuelfodor](https://github.com/immanuelfodor) - Resurrected fork of the original emojione project
 - [favicons](https://github.com/trailjeep/shaarli-favicons) by [@trailjeep](https://github.com/trailjeep) - Shaarli plugin to add favicon/filetype icons to Shaares.
-- [google analytics](https://github.com/ericjuden/Shaarli-Google-Analytics-Plugin) by [@ericjuden](http://github.com/ericjuden): Adds Google Analytics tracking support
+- [google analytics](https://github.com/ericjuden/Shaarli-Google-Analytics-Plugin) by [@ericjuden](https://github.com/ericjuden): Adds Google Analytics tracking support
 - [launch](https://github.com/ArthurHoaro/launch-plugin) - Launch Plugin is a plugin designed to enhance and customize Launch Theme for Shaarli.
 - [markdown-toolbar](https://github.com/immanuelfodor/shaarli-markdown-toolbar) by [@immanuelfodor](https://github.com/immanuelfodor) - Easily insert markdown syntax into the Description field when editing a Shaare.
 - [related](https://github.com/ilesinge/shaarli-related) by [@ilesinge](https://github.com/ilesinge) - Show related Shaares based on the number of identical tags.
@@ -32,41 +32,36 @@ See [REST API](REST-API.md) for a list of official and community clients.
 - [webhooks](https://gitlab.com/flow.gunso/shaarli-webhooks) by [@flow.gunso](https://gitlab.com/flow.gunso) - Shaarli plugin that enables user-defined callback URL, i.e. webhooks, for specific Shaarli events (link saving, deletion...)
 
 
-### Custom CSS
-
-- [mrjovanovic/serious-theme-shaarli](https://github.com/mrjovanovic/serious-theme-shaarli) - A serious theme for Shaarli
-- [shaarli/shaarli-themes](https://github.com/shaarli/shaarli-themes)
-
-
 ### Themes
 
-- [AkibaTech/Shaarli Superhero Theme](https://github.com/AkibaTech/Shaarli---SuperHero-Theme) - A template/theme for Shaarli
+- [AkibaTech/Shaarli Superhero Theme](https://github.com/MarceauKa/Shaarli---SuperHero-Theme) - A template/theme for Shaarli
 - [alexisju/albinomouse-template](https://github.com/alexisju/albinomouse-template) - A full template for Shaarli
 - [ArthurHoaro/shaarli-launch](https://github.com/ArthurHoaro/shaarli-launch) - Customizable Shaarli theme
 - [dhoko/ShaarliTemplate](https://github.com/dhoko/ShaarliTemplate) - A template/theme for Shaarli
 - [kalvn/shaarli-blocks](https://github.com/kalvn/shaarli-blocks) - A template/theme for Shaarli
 - [kalvn/Shaarli-Material](https://github.com/kalvn/Shaarli-Material) - A theme (template) based on Google's Material Design for Shaarli, the superfast delicious clone
 - [ManufacturaInd/shaarli-2004licious-theme](https://github.com/ManufacturaInd/shaarli-2004licious-theme) - A template/theme as a humble homage to the early looks of the del.icio.us site
 - [xfnw/shaarli-default-dark](https://github.com/xfnw/shaarli-default-dark) - The default theme but nice and dark for your eyeballs
+- [mrjovanovic/serious-theme-shaarli](https://github.com/mrjovanovic/serious-theme-shaarli) - A serious theme for Shaarli (custom CSS)
 
 
 ### Integration with other platforms
 
-- [tt-rss-shaarli](https://github.com/jcsaaddupuy/tt-rss-shaarli) - [Tiny-Tiny RSS](http://tt-rss.org/) plugin that adds support for sharing articles with Shaarli
+- [tt-rss-shaarli](https://github.com/jcsaaddupuy/tt-rss-shaarli) - [Tiny-Tiny RSS](https://tt-rss.org/) plugin that adds support for sharing articles with Shaarli
 - [octopress-shaarli](https://github.com/ahmet2mir/octopress-shaarli) - Octopress plugin to retrieve Shaarli Shaares on the sidebar
 - [Scuttle to Shaarli](https://github.com/q2apro/scuttle-to-shaarli) - Import bookmarks from Scuttle
-- [Shaarli app for Cloudron](https://git.cloudron.io/cloudron/shaarli-app) - [![](https://img.shields.io/badge/Cloudron-03A9F4?logo=Buffer)](https://cloudron.io/button.html?app=com.github.shaarli) Effortlessly run Shaarli with the help of [Cloudron](https://cloudron.io/) 
+- [Shaarli app for Cloudron](https://www.cloudron.io/button.html?app=com.github.shaarli) - [![](https://img.shields.io/badge/Cloudron-03A9F4?logo=Buffer)](https://www.cloudron.io/button.html?app=com.github.shaarli) Effortlessly run Shaarli with the help of [Cloudron](https://www.cloudron.io/)
 - [Shaarli_ynh](https://github.com/YunoHost-Apps/shaarli_ynh) - [![](https://img.shields.io/badge/YunoHost-black?logo=Buffer)](https://install-app.yunohost.org/?app=shaarli) Shaarli is available as a [Yunohost](https://yunohost.org) app
-- [shaarli_poster](https://github.com/getpelican/pelican-plugins/tree/master/shaarli_poster) - [pelican](https://blog.getpelican.com) static blog generator plugin to auto-post articles on a Shaarli instance
+- [shaarli_poster](https://github.com/getpelican/pelican-plugins/tree/master/shaarli_poster) - [pelican](https://getpelican.com) static blog generator plugin to auto-post articles on a Shaarli instance
 - [shaarli .deb package](https://packages.debian.org/search?keywords=shaarli) - for [Debian](https://www.debian.org/) and [Freedombox](https://www.freedombox.org/)
 
 
 ### Mobile apps
 
-- [ShaarliOS](https://github.com/mro/ShaarliOS) - [![](https://img.shields.io/badge/App%20Store-black?logo=apple)](https://itunes.apple.com/app/ShaarliOS/id1027441388) Apple iOS share extension.
+- [ShaarliOS](https://github.com/mro/ShaarliOS) - [![](https://img.shields.io/badge/App%20Store-black?logo=apple)](https://apps.apple.com/app/shaarlios/id1027441388) Apple iOS share extension.
 - [Shaarlier for Android](https://github.com/dimtion/Shaarlier) - [![](https://img.shields.io/badge/Play%20Store-3EB7C0?logo=Google%20Play)](https://play.google.com/store/apps/details?id=com.dimtion.shaarlier) Android application to simply add Shaares directly into your Shaarli via Sharing. Free software.
 - [Stakali for Android](https://stakali.toneiv.eu) - [![](https://img.shields.io/badge/Play%20Store-3EB7C0?logo=Google%20Play)](https://play.google.com/store/apps/details?id=eu.toneiv.stakali) Stakali is a personal bookmark manager which synchronizes with Shaarli. Support offline work without instance, sync, browsing within app. Free use of up to 20 results.
-- [Shaarli for Android](http://sebsauvage.net/links/?ZAyDzg) - Android application that adds Shaarli as a sharing provider.
+- [Shaarli for Android](https://sebsauvage.net/links/?ZAyDzg) - Android application that adds Shaarli as a sharing provider.
 
 
 ### Desktop apps
@@ -76,10 +71,10 @@ See [REST API](REST-API.md) for a list of official and community clients.
 
 ### Browser extensions
 
-- [Shaarli Firefox Extension](https://github.com/ikipatang/shaarli-web-extension) - [![](https://img.shields.io/badge/Firefox%20Add--ons-414141?logo=Firefox)](https://addons.mozilla.org/firefox/addon/shaarli/) toolbar button to share your current tab with Shaarli. 
-- [Shaarli Chrome Extension](https://github.com/octplane/Shiny-Shaarli) - toolbar button to share your current tab with Shaarli. [Removed](https://chrome.google.com/webstore/detail/shiny-shaarli/hajdfkmbdmadjmmpkkbbcnllepomekin) from Chrome web store.
+- [Shaarli Firefox Extension](https://github.com/ikipatang/shaarli-web-extension) - [![](https://img.shields.io/badge/Firefox%20Add--ons-414141?logo=Firefox)](https://addons.mozilla.org/en-US/firefox/addon/shaarli/) toolbar button to share your current tab with Shaarli.
 - [Add to Shaarli](https://github.com/burgyl/AddToShaarli) - [![](https://img.shields.io/badge/Chrome%20Web%20Store-white?logo=Google%20Chrome)](https://chrome.google.com/webstore/detail/add-to-shaarli/jhfblapoehcfajokolimghdfmeeakbee) lets you add the current tab or a note to your Shaarli instance.
 - [WebLinks Ext](https://chrome.google.com/webstore/detail/weblinks-ext/pnejcofgljlklmmjkocipnanfdbaclke) - [![](https://img.shields.io/badge/Chrome%20Web%20Store-white?logo=Google%20Chrome)](https://chrome.google.com/webstore/detail/weblinks-ext/pnejcofgljlklmmjkocipnanfdbaclke) Save, edit and use your Shaarli. Support work offline, sync, trash, etc. Free software.
+- [Shaarli Chrome Extension](https://github.com/octplane/Shiny-Shaarli) - toolbar button to share your current tab with Shaarli. (Removed from Chrome web store).
 
 
 ### Server apps
@@ -91,25 +86,24 @@ See [REST API](REST-API.md) for a list of official and community clients.
 - [Shaarlimages](https://github.com/BoboTiG/shaarlimages) - An image-oriented aggregator for Shaarlis
 - [mknexen/shaarli-api](https://github.com/mknexen/shaarli-api) - A REST API for Shaarli
 - [Self dead link](https://framagit.org/qwertygc/shaarli-dev-code/blob/master/self-dead-link.php) - Detect dead links on shaarli. This version use the database of shaarli. [Another version](https://framagit.org/qwertygc/shaarli-dev-code/blob/master/dead-link.php), can be used for other shaarli instances (but is more resource consuming).
-- [Bookmark Archiver](https://github.com/pirate/bookmark-archiver) - Save an archived copy of all websites starred using browser bookmarks/Shaarli/Delicious/Instapaper/Unmark.it/Pocket/Pinboard. Outputs browseable html.
+- [Bookmark Archiver](https://github.com/ArchiveBox/ArchiveBox) - Save an archived copy of all websites starred using browser bookmarks/Shaarli/Delicious/Instapaper/Unmark.it/Pocket/Pinboard. Outputs browseable html.
 
 
 ## Alternatives to Shaarli
 
-See [awesome-selfhosted: bookmarks & link sharing](https://github.com/Kickball/awesome-selfhosted/#bookmarks--link-sharing).
+See [awesome-selfhosted: bookmarks & link sharing](https://awesome-selfhosted.net/tags/bookmarks-and-link-sharing.html).
 
 
 ## Community
 
-- [Liens en vrac de sebsauvage](http://sebsauvage.net/links/) - the original Shaarli
+- [Liens en vrac de sebsauvage](https://sebsauvage.net/links/) - the original Shaarli
 - [A large list of Shaarlis](http://porneia.free.fr/pub/links/ou-est-shaarli.html)
 - [A list of working Shaarli aggregators](https://raw.githubusercontent.com/Oros42/find_shaarlis/master/annuaires.json)
 - [A list of some known Shaarlis](https://github.com/Oros42/shaarlis_list)
-- [Adieu Delicious, Diigo et StumbleUpon. Salut Shaarli ! - sebsauvage.net](http://sebsauvage.net/rhaa/index.php?2011/09/16/09/29/58-adieu-delicious-diigo-et-stumbleupon-salut-shaarli-) (fr) _16/09/2011 - the original post about Shaarli_
-- [Original ideas/fixme/TODO page](http://sebsauvage.net/wiki/doku.php?id=php:shaarli:ideas)
-- [Original discussion page](http://sebsauvage.net/wiki/doku.php?id=php:shaarli:discussion) (fr)
-- [Original revisions history](http://sebsauvage.net/wiki/doku.php?id=php:shaarli:history)
-- [Shaarli.fr/my](https://www.shaarli.fr/my.php) - Unofficial, unsupported (old fork) hosted Shaarlis provider, courtesy of [DMeloni](https://github.com/DMeloni)
+- [Adieu Delicious, Diigo et StumbleUpon. Salut Shaarli ! - sebsauvage.net](https://sebsauvage.net/rhaa/index.php?2011/09/16/09/29/58-adieu-delicious-diigo-et-stumbleupon-salut-shaarli-) (fr) _16/09/2011 - the original post about Shaarli_
+- [Original ideas/fixme/TODO page](https://sebsauvage.net/wiki/doku.php?id=php:shaarli:ideas)
+- [Original discussion page](https://sebsauvage.net/wiki/doku.php?id=php:shaarli:discussion) (fr)
+- [Original revisions history](https://sebsauvage.net/wiki/doku.php?id=php:shaarli:history)
 
 
 ### Articles and social media discussions
@@ -124,4 +118,4 @@ See [awesome-selfhosted: bookmarks & link sharing](https://github.com/Kickball/a
 It also appears in the following recommendation lists:
 - [AlternativeTo](https://alternativeto.net/software/shaarli/)
 - [FramaLibre](https://framalibre.org/content/shaarli)
-- [Project Awesome: Selfhosted Bookmarks and Link Sharing](https://project-awesome.org/Kickball/awesome-selfhosted)
+- [Awesome-Selfhosted - Bookmarks and Link Sharing](https://awesome-selfhosted.net/tags/bookmarks-and-link-sharing.html)

doc/md/Docker.md

@@ -49,10 +49,10 @@ Shaarli images are available on [GitHub Container Registry](https://github.com/s
 These images are built automatically on Github Actions and rely on:
 
 - [Alpine Linux](https://www.alpinelinux.org/)
-- [PHP7-FPM](http://php-fpm.org/)
-- [Nginx](http://nginx.org/)
+- [PHP7-FPM](https://php-fpm.org/)
+- [Nginx](https://nginx.org/)
 
-Additional Dockerfiles are provided for the `arm32v7` platform, relying on [Linuxserver.io Alpine armhf images](https://hub.docker.com/r/lsiobase/alpine.armhf/). These images must be built using [`docker build`](https://docs.docker.com/engine/reference/commandline/build/) on an `arm32v7` machine or using an emulator such as [qemu](https://resin.io/blog/building-arm-containers-on-any-x86-machine-even-dockerhub/).
+Additional Dockerfiles are provided for the `arm32v7` platform, relying on [Linuxserver.io Alpine armhf images](https://hub.docker.com/r/lsiobase/alpine.armhf/). These images must be built using [`docker build`](https://docs.docker.com/engine/reference/commandline/build/) on an `arm32v7` machine or using an emulator such as [qemu](https://blog.balena.io/building-arm-containers-on-any-x86-machine-even-dockerhub/).
 
 Here is an example of how to run Shaarli latest image using Docker:
 
@@ -98,7 +98,7 @@ A [Compose file](https://docs.docker.com/compose/compose-file/) is a common form
 
 A `docker-compose.yml` file can be used to run a persistent/autostarted shaarli service using [Docker Compose](https://docs.docker.com/compose/) or in a [Docker stack](https://docs.docker.com/engine/reference/commandline/stack_deploy/).
 
-Shaarli provides configuration file for Docker Compose, that will setup a Shaarli instance, a [Træfik](https://containo.us/traefik/) instance (reverse proxy) with [Let's Encrypt](https://letsencrypt.org/) certificates, a Docker network, and volumes for Shaarli data and Træfik TLS configuration and certificates.
+Shaarli provides configuration file for Docker Compose, that will setup a Shaarli instance, a [Træfik](https://traefik.io/traefik/) instance (reverse proxy) with [Let's Encrypt](https://letsencrypt.org/) certificates, a Docker network, and volumes for Shaarli data and Træfik TLS configuration and certificates.
 
 Download docker-compose from the [release page](https://docs.docker.com/compose/install/):
 
@@ -204,27 +204,24 @@ $ docker system prune
 ## References
 
 - [Docker: using volumes](https://docs.docker.com/storage/volumes/)
-- [Dockerfile best practices](https://docs.docker.com/articles/dockerfile_best-practices/)
-- [Dockerfile reference](https://docs.docker.com/reference/builder/)
+- [Dockerfile best practices](https://docs.docker.com/develop/develop-images/dockerfile_best-practices/)
+- [Dockerfile reference](https://docs.docker.com/engine/reference/builder/)
 - [GitHub Container Registry](https://github.com/features/packages)
 - [GithHub Packages documentation](https://docs.github.com/en/packages)
 - [DockerHub: Teams and organizations](https://docs.docker.com/docker-hub/orgs/), [End of Docker free teams](https://www.docker.com/blog/we-apologize-we-did-a-terrible-job-announcing-the-end-of-docker-free-teams/)
-- [Get Docker CE for Debian](https://docs.docker.com/install/linux/docker-ce/debian/)
+- [Get Docker CE for Debian](https://docs.docker.com/engine/install/debian/)
 - [Install Docker Compose](https://docs.docker.com/compose/install/)
-- [Interactive Docker training portal](https://www.katacoda.com/courses/docker/) on [Katakoda](https://www.katacoda.com/)
-- [Service management: Nginx in the foreground](http://nginx.org/en/docs/ngx_core_module.html#daemon)
-- [Service management: Using supervisord](https://docs.docker.com/articles/using_supervisord/)
+- [Service management: Nginx in the foreground](https://nginx.org/en/docs/ngx_core_module.html#daemon)
+- [Service management: Run multiple services in a container](https://docs.docker.com/config/containers/multi-service_container/)
 - [Volumes](https://docs.docker.com/storage/volumes/)
-- [Where are Docker images stored?](http://blog.thoward37.me/articles/where-are-docker-images-stored/)
+- [Where are Docker images stored?](https://blog.thoward37.me/articles/where-are-docker-images-stored/)
 - [docker create](https://docs.docker.com/engine/reference/commandline/create/)
 - [Docker Documentation](https://docs.docker.com/)
 - [docker exec](https://docs.docker.com/engine/reference/commandline/exec/)
 - [docker images](https://docs.docker.com/engine/reference/commandline/images/)
 - [docker logs](https://docs.docker.com/engine/reference/commandline/logs/)
-- [docker logs](https://docs.docker.com/engine/reference/commandline/logs/)
-- [Docker Overview](https://docs.docker.com/engine/docker-overview/)
+- [Docker Overview](https://docs.docker.com/get-started/overview/)
 - [docker ps](https://docs.docker.com/engine/reference/commandline/ps/)
 - [docker pull](https://docs.docker.com/engine/reference/commandline/pull/)
 - [docker run](https://docs.docker.com/engine/reference/commandline/run/)
-- [docker-compose logs](https://docs.docker.com/compose/reference/logs/)
-- Træfik: [Getting Started](https://docs.traefik.io/), [Docker backend](https://docs.traefik.io/configuration/backends/docker/), [Let's Encrypt](https://docs.traefik.io/user-guide/docker-and-lets-encrypt/), [Docker image](https://hub.docker.com/_/traefik/)
+- Træfik: [Documentation](https://doc.traefik.io/traefik/), [Docker image](https://hub.docker.com/_/traefik/)

doc/md/Installation.md

@@ -17,8 +17,8 @@ sudo rsync -avP Shaarli/ /var/www/shaarli.mydomain.org/
 These components are required to build Shaarli:
 
 - [Composer](dev/Development.md#install-composer) to manage third-party [PHP dependencies](dev/Development#third-party-libraries).
-- [yarn](https://yarnpkg.com/lang/en/docs/install/) to build frontend dependencies.
-- [python3-virtualenv](https://pypi.python.org/pypi/virtualenv) to build local HTML documentation.
+- [yarn](https://classic.yarnpkg.com/en/docs/install/) to build frontend dependencies.
+- [python3-virtualenv](https://pypi.org/project/virtualenv/) to build local HTML documentation.
 
 ```bash
 # example from a Debian-based build machine