README: Document commands

README.md

@@ -26,3 +26,53 @@ To run the bot simply execute ``main.py``:
 ```sh
 ./main.py
 ```
+
+## Commands
+### Basic
+#### `/sayhello`
+Prints ``Hello world!``
+
+#### `/ping`
+Shows the bot's latency.
+
+### Messages
+#### `/set_forward_channel <#channel>`
+Sets channel to forward messages to.
+
+#### `>forward`
+Forwards message to set channel
+
+### Roles
+#### `/secretroles`
+Manages roles locked behind a password.
+
+Lock ``@role`` behind a password ``supersecret``:
+```
+/secretroles add @role supersecret
+```
+
+Delete password ``supersecret``, so role is no longer obtainable with it:
+```
+/secretroles delete supersecret
+```
+
+List all current passwords and their roles:
+```
+/secretroles list
+```
+
+### KSP
+Ksp related commands
+
+#### `/task`
+Generates urls for given task.
+
+#### `/deadlines`
+Shows deadlines of currently running series.
+
+### News
+#### `/news set_channel <#channel>`
+Set channel for posting news.
+
+#### `/news post_news <id>`
+Post news with given `id` to set channel.