Update README.md

README.md

@@ -27,6 +27,12 @@ If you are not already logged in, you need to authenticate to the Container Regi
 docker login registry.digitallearning.gmbh
 ```
 
+## Create Docker Network
+Different containers communicate via a Docker network `web`, which must be created before Docker compose files are executed.
+```bash
+docker network create web
+```
+
 ## LRS / MongoDB
 First we need a database or LRS to store the xAPI Statements. In a local setup, you can use the docker container in the mongodb folder. 
 Rename or copy the sample configuration. Please change all passwords in the configuration file. 
@@ -88,4 +94,4 @@ docker compose up -d
 ## Update Docker Images 
 ```bash
 docker compose pull
-```
+```
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