SIAB Version 2.1.0

Various small feature additions / improvements to SIAB (Steem-in-a-box)

• Added example.env file, showing various .env options that can be configured

• Added STEEM_SOURCE build argument to dkr/Dockerfile and dkr_full/Dockerfile - this allows for the default Git repository to be changed if needed, e.g. building forks / testing changes made on personal fork

Changes to run.sh

• Now uses Privex ShellCore, so I don't have to keep copy-pasting code snippets into the project.

• Added STEEM_SOURCE env var which can be overrided using export STEEM_SOURCE=xxx or by adding the config option to .env

• build() supports STEEM_SOURCE as both a build arg, and env fallback.

  • First checks if STEEM_SOURCE was specified in the CLI build arguments
  • If it was specified in the CLI build arguments, then that takes precedence and the env var STEEM_SOURCE will be ignored.
  • If it WASN'T specified in the build arguments, it will add a build argument for STEEM_SOURCE using the env var STEEM_SOURCE

• The env option PORTS now supports the more specific 1.2.3.4:8090:8090 format, allowing for exposing ports only on localhost, or only for a specific external IP address etc.