update readme

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "bot/cogs/cog-template"]
+	path = bot/cogs/cog-template
+	url = https://git.ao-it.net/templatecity/bot-discord-cog

README.md

@@ -1,6 +1,23 @@
 # Template: Discord Bot
 ## Howto
+### get token
 1. Go to: https://discord.com/developers/applications
 2. Create a new Aplication
 3. In the Application go to Bot, add them and copy the token
 4. Add the token in bot.conf
+
+### add cogs
+1. add cog to `./bot/cogs` with main file `cog.py` (sub dir is allowed)
+2. optional use submodule like: https://git.ao-it.net/templatecity/bot-discord-cog
+```bash
+git submodule add $URL ./bot/cogs/myCog/
+```
+
+### run bot
+```bash
+python3 main.py
+```
+or 
+```bash
+./main.py
+```