Config documentation added

config.ini

@@ -1,15 +1,52 @@
 [main]
+; This is a list of output modules. Each module should be defined in section,
+; named "module/MODULENAME". Space-separated list of strings.
 modules = telegram
+
+; Mastodon instance to grab posts from
 instance = mastodon.example.org
+
+; Mastodon user token.
+; Required permissions: read:statuses read:lists
+; You can get your token by creating application in
+; ${instance}/settings/applications
 token = blahblah
-user = 12345
+
+; Mastodon user ID. Used to filter out posts. Unfortunately, I can't find a way
+; to get it using token itself. GARGOOOOOOON!!!!!
+; Anyways, you could navigate to your profile ${instance}/@${username} and
+; look for your profile picture link. For example, for me it's
+; https://mastodon.astrr.ru/system/accounts/avatars/107/914/495/779/447/227/original/9651ac2f47cb2993.jpg
+; that part between "avarars" and "original" is the user ID. Grab it, remove
+; all of the slashes and you should be left with, for example, this:
+user = 107914495779447227
+
+; Mastodon user list ID. AGAIN, UNFORTUNATELY, there is no way to reliably use
+; streaming API to get all of your posts. Using home timeline is unreliable and
+; does not always include boosts, same with public:local
+; So, create a list, add yourself here, and put its ID here (it should be in
+; address bar while you have that list open)
 list = 1
 
+; Example Telegram integration. You can use it as a template
 [module/telegram]
+
+; For Telegram it should be "telegram". Obviously
 type = telegram
+
+; Telegram Bot API token. There's plenty of guides how to obtain one.
+; https://core.telegram.org/bots#3-how-do-i-create-a-bot
 token = 12345:blahblah
+
+; Telegram channel/chat ID or name. Also can be just a regular user.
+; You can use @showjsonbot to obtain your channel ID, or just use its
+; username, if it is public
 chat = @username
+
+; Should we show link to post as a link after post content?
 show-post-link = yes
+
+; Should we show link to original author before post content?
 show-boost-from = yes
 
 # TODO: add discord functionality