Close the adversarial review round: auth hardening, data fidelity against the platform context, backend grants and docker coherence

docker-compose.yml

@@ -4,7 +4,7 @@ services:
       context: .
       dockerfile: Dockerfile
     ports:
-      - "3000:3000"
+      - "5000:3000"
     environment:
       - PORT=3000
       - NODE_ENV=production
@@ -22,7 +22,8 @@ services:
     ports:
       - "3003:3003"
     env_file:
-      - ./backend/.env
+      - path: ./backend/.env
+        required: false
     environment:
       - SEMAPPS_HOME_URL=${SEMAPPS_HOME_URL:-http://localhost:3003}
       - SEMAPPS_FRONT_URL=${SEMAPPS_FRONT_URL:-http://localhost:5000}