include useful docker commands

README.md

@@ -44,3 +44,11 @@ This should look like:
 ## Authors
 
 - Maximilian Gruber
+
+## Useful commands
+
+interactive shell inside running container:
+`docker exec -it cocalibration_networking_layer-backend-1 /bin/bash`
+
+copy files from container to host:
+`docker cp cocalibration_networking_layer-backend-1:/code/sql_app.db ~/Desktop/inspection/data`