Update README

README.md

@@ -1,2 +1,19 @@
 # discord-rss-bot
-A RSS bot for Discord
+
+A RSS bot for Discord built with [reader](https://github.com/lemon24/reader). It is designed to be executed by a [cron job](https://wiki.archlinux.org/title/Cron) or [systemd timer](https://wiki.archlinux.org/title/Systemd/Timers).
+
+    Usage: discord_rss_bot.py [OPTIONS] COMMAND [ARGS]...
+
+    Options:
+    --install-completion  Install completion for the current shell.
+    --show-completion     Show completion for the current shell, to copy it or customize the installation.
+    --help                Show this message and exit.
+
+    Commands:
+    add          Add a feed to the database
+    backup       Backup the database
+    check        Check new entries for every feed
+    delete       Delete a feed from the database
+    stats        Print the number of feeds and entries in the database
+    webhook-add  Add a webhook to the database
+    webhook-get  Get the webhook url