Update README.md

README.md

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 # Yomer
 
+Yomer is a Discord voice bot to speak out text messages sent to text channels.
+
+## Deploy
+
+The easiest way is to use Docker Compose.
+
+TBD
+
+## Usage
+
+Text `!ymr join` to join Yomer to your voice channel. Yomer will then read all text messages aloud. Use `!ymr leave` to make Yomer leave your channel.
+
+## Build locally
+
+Set up [OPAM](https://opam.ocaml.org/) first. Then, run the following steps:
+
 ```
-opam switch create . --no-install
-opam pin cohttp https://github.com/ushitora-anqou/ocaml-cohttp.git#yomer
-opam pin cohttp-eio https://github.com/ushitora-anqou/ocaml-cohttp.git#yomer
-opam pin websocket https://github.com/ushitora-anqou/ocaml-websocket.git#eio
-#opam pin websocket-eio https://github.com/ushitora-anqou/ocaml-websocket.git#eio
-opam pin sodium https://github.com/ushitora-anqou/ocaml-sodium.git#yomer
+opam switch create --no-install . 5.1.0
+opam pin cohttp https://github.com/mirage/ocaml-cohttp.git#v6.0.0_beta1
+opam pin cohttp-eio https://github.com/mirage/ocaml-cohttp.git#v6.0.0_beta1
+opam pin sodium https://github.com/ahrefs/ocaml-sodium.git#734eccbb47e7545a459a504188f1da8dc0bd018e
 opam install . --deps-only
+dune build bin/main.exe
 ```