Added Docker-Compose instructions

README.md

@@ -70,6 +70,43 @@ To change the external port the server uses, change the *first* instance of the
 docker run -d -p 8123:9736 ottomated/crewlink-server:latest
 ```
 
+## Docker-Compose
+
+Run the server with [Docker-Compose](https://docs.docker.com/compose/install/) by creating following commands: 
+
+1. Create a folder
+```sh 
+mkdir /opt/crewlink
+cd /opt/crewlink
+```
+
+2. Create docker-compose.yml (In my example with nano)
+```sh
+nano docker-compose.yml
+```
+
+3. Paste and edit the following text
+```
+version: '3.3'
+services:
+    crewlink-server:
+        environment:
+            - ADDRESS=crewlink.example.com        # This needs to be adjusted to your FQDN
+            - PORT=9736                           # Change this to whatever port of the docker container should be used. Make sure to adjust the letter port below as well
+            - NAME=Crewlink Server                # Not necessary; Change to whatever you like
+#           - HTTPS=true                          # This needs to be uncommented in case you want to use SSL
+#           - SSLPATH=/path/to/ssl/cert/and/key   # This needs to be uncommented and adjusted in case you want to use SSL
+        ports:
+            - '9736:9736'                         # First port needs defines the port used on your host; Latter must be the same as the port defined above in environment 
+        image: 'ottomated/crewlink-server:latest'
+```
+
+4. Press `ctrl + o` to overwrite and hit `enter`
+
+5. press `ctrl + x` to exit nano
+
+6. Run CrewLink by typing `docker-compose up -d`
+
 ### Building the Docker Image
 
 To build your own Docker image, do the following: