diff --git a/.gitignore b/.gitignore
index 736e20c..35ea3c2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@ venv
 __pycache__
 *.json
 data.db
+signal-cli-config
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..26971da
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,17 @@
+# Basis-Image (kann je nach Python-Version angepasst werden)
+FROM python:3.13-slim
+
+# Arbeitsverzeichnis erstellen
+WORKDIR /app
+
+# Requirements in den Container kopieren
+COPY requirements.txt requirements.txt
+
+# Abhängigkeiten installieren
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Quellcode in den Container kopieren
+COPY . .
+
+# Flask Server starten
+CMD ["python", "-u", "main.py"]
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..f9af7b5
--- /dev/null
+++ b/README.md
@@ -0,0 +1,60 @@
+# Lab signal bot
+
+## Starting
+
+### Configuration
+
+Create a config:
+```
+cp config.json.example config.json
+vi config.json
+```
+
+(Inside the docker container, "http://signal-cli-rest-api:8080" can be resolved to the host of the other docker container. Outside not.)
+
+### Link the signal-cli bot
+
+Start containers:
+
+```
+docker compose up -d
+```
+
+In the beginning, this will only start the `signal-cli-rest-api` docker container. The other container will fail, since the `signal-cli` is not linked to the account. If you already activated the phone number with another signal device, you can register the new device.
+
+Join the docker do this:
+```
+docker exec -it lab-signal-bot-signal-cli-rest-api-1 /bin/bash
+```
+
+Change user:
+```
+su signal-api
+```
+
+Link the new device:
+```
+signal-cli --config /home/.local/share/signal-cli link
+```
+
+Exit the docker shell.
+
+Restart docker container:
+```
+docker restart lab-signal-bot-signal-cli-rest-api-1
+```
+
+From host, list signal groups:
+```
+python list_signal_groups.py --api-url http://localhost:8080/ -i
+```
+
+Now, you can set the identifier of the group you want in the config.json:
+```
+vi config.json
+```
+
+Rebuild containers:
+```
+docker compose up --build -d
+```
\ No newline at end of file
diff --git a/config.json.example b/config.json.example
index 416e21b..2fd2785 100644
--- a/config.json.example
+++ b/config.json.example
@@ -1,5 +1,5 @@
 {
-    "apiurl": "http://localhost:8080",
+    "apiurl": "http://signal-cli-rest-api:8080",
     "number": "+4900000000001",
     "lab_cleaning_signal_base_group": "group.00000000000000000000000000000000000000000000000000000000000="
 }
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..788d312
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,15 @@
+services:
+  signal-cli-rest-api:
+    image: bbernhard/signal-cli-rest-api:latest-dev
+    environment:
+      - MODE=json-rpc #supported modes: json-rpc, native, normal
+      #- AUTO_RECEIVE_SCHEDULE=0 22 * * * #enable this parameter on demand (see description below)
+    ports:
+      - "8080:8080" #map docker port 8080 to host port 8080.
+    volumes:
+      - "./signal-cli-config:/home/.local/share/signal-cli"
+  lab-bot:
+    build: .
+    volumes:
+      - "./config.json:/app/config.json"
+      - "./data.db:/app/data.db"
diff --git a/list_signal_groups.py b/list_signal_groups.py
index 6e5183d..ed34b85 100644
--- a/list_signal_groups.py
+++ b/list_signal_groups.py
@@ -5,13 +5,18 @@ from result import is_err
 import argparse
 
 if __name__ == "__main__":
-    api = SignalAPI(config.apiurl, config.number)
 
     parser = argparse.ArgumentParser(description='List all groups')
     parser.add_argument('-i', "--show-group-ids", action='store_true', help='show group ids')
+    parser.add_argument('--api-url', type=str, default=None, help='API URL')
 
     args = parser.parse_args()
 
+    if args.api_url is not None:
+        config.apiurl = args.api_url
+
+    api = SignalAPI(config.apiurl, config.number)
+
     groups_result = api.get_groups()
 
     if is_err(groups_result):
diff --git a/main.py b/main.py
index b0aedde..c665fec 100644
--- a/main.py
+++ b/main.py
@@ -536,6 +536,8 @@ async def main(config: Config, session: Session):
     bot = LabCleaningBot(api, config.lab_cleaning_signal_base_group)
     bot.assert_is_base_group_admin()
 
+    print("Bot started.")
+
     await asyncio.gather(
         bot.receiver(session),
         bot.sync_members_and_tasks(session)