Edit .env.docker file. COLLAB_ROOT should have the IP address of Collaboration system and port number 7000. H5P_ROOT should have the IP address of H5P server and port 8000. It should look something like given below.
Edit .env.docker file. RecommendationIP should have the IP address of Recommendation system and RecommendationPort should have port 3445. It should look something like given below.