documented the osm loading in the docker-compose file

docker-compose.yml

@@ -247,6 +247,51 @@ services:
       - "traefik.http.middlewares.navigatum-redirect-to-https.redirectregex.replacement=https://nav.tum.de/$${3}"
       - "traefik.http.middlewares.navigatum-redirect-to-https.redirectregex.permanent=true"
       - "traefik.http.services.navigatum-redirect-https.loadbalancer.server.port=80"
+    # see the readme, this is only required once
+    # osm2pgsql_create:
+    #   image: iboates/osm2pgsql:latest
+    #   command:
+    #     - osm2pgsql
+    #     - --create
+    #     - --slim
+    #     - --database
+    #     - ${POSTGRES_DB}
+    #     - --user
+    #     - ${POSTGRES_USER}
+    #     - --host
+    #     - db
+    #     - --port
+    #     - '5432'
+    #     - /data/data.pbf
+    #     - --hstore
+    #     - --hstore-add-index
+    #     - --hstore-column
+    #     - raw
+    #   environment:
+    #     - PGPASSWORD=${POSTGRES_PASSWORD}
+    #   depends_on:
+    #     db:
+    #       condition: service_healthy
+    #   volumes:
+    #     - ./:/data:ro
+    # osm_replication_init:
+    #   image: iboates/osm2pgsql:latest
+    #   command:
+    #     - replication
+    #     - init
+    #     - --database
+    #     - ${POSTGRES_DB}
+    #     - --username
+    #     - ${POSTGRES_USER}
+    #     - --host
+    #     - db
+    #     - --port
+    #     - '5432'
+    #   environment:
+    #     - PGPASSWORD=${POSTGRES_PASSWORD}
+    #   depends_on:
+    #     osm2pgsql_create:
+    #       condition: service_completed_successfully
 
 volumes:
   tileserver-src: