diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,8 +1,41 @@
 # matrix-bot
 
-Unser Matrix-Bot, der Gruppen, Gruppenmitgliedschaften und Rechte verwaltet.
+A Matrix-Bot which is able to:
+- create default rooms and add all users to them
+- create rooms from projects and add/remove their members/non-members
+- give/remove Admin and Moderator role to users with/without a certain group membership
 
 # How it works
 
-1. load all users from matrix
-2. add all users to the default channels
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+1. create default rooms
+2. load users and their groups from matrix and ldap
+3. create rooms for all projects which have `sophomorixMailList=TRUE`
+4. load all rooms (created by the bot) and their power levels from matrix
+5. sync user memberships and power levels
+
+# How to use
+
+.matrix-bot.env:
+```env
+MATRIX_BOT_LDAP_URI="ldap://10.0.0.1"
+MATRIX_BOT_LDAP_BASE_DN=DC=linuxmuster,DC=lan
+MATRIX_BOT_LDAP_BIND_DN=CN=global-binduser,OU=Management,OU=GLOBAL,DC=linuxmuster,DC=lan
+MATRIX_BOT_LDAP_BIND_DN_PASSWORD=SomeSuperSafePassword
+MATRIX_BOT_MATRIX_SERVER="https://matrix.org"
+MATRIX_BOT_MATRIX_DOMAIN="matrix.org"
+MATRIX_BOT_MATRIX_SPACE_ID="!bajjed:matrix.org"
+MATRIX_BOT_MATRIX_USERNAME="synapse"
+MATRIX_BOT_MATRIX_PASSWORD="SomeSuperSafePassword"
+MATRIX_BOT_DEFAULT_ROOMS="info,talk,show"
+MATRIX_BOT_ADMIN_GROUP="p_admin"
+MATRIX_BOT_MODERATOR_GROUP="p_moderator"
+```
+
+docker-compose.yaml:
+```yaml
+version: "3"
+services:
+  matrix-bot:
+    image: git.makerlab-murnau.de/makerlab/matrix-bot:latest
+    env_file: .matrix-bot.env
+```
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