more docker integration test tweaks

docker-compose.yml

@@ -10,17 +10,17 @@ services:
       - REDIS_HOST=redis
   redis:
     image: redis:alpine
-    ports:
-      - "6379:6379"
   selenium:
     image: b4handjr/selenium-firefox
     ports:
-      - "5900"
-      - "4444:4444"
+      - "${VNC_PORT:-5900}:5900"
     shm_size: 2g
   integration-tests:
     build: ./test/integration
+    environment:
+      - BASE_URL=${BASE_URL:-http://web:1443}
     links:
       - web
       - selenium
-
+    volumes:
+      - "./coverage:/coverage"