Add environment variables for BASE_URL and VUE_APP_DOMAIN in Docker Compose

docker-compose.yml

@@ -7,6 +7,8 @@ services:
     volumes:
       - ./conf.yml:/app/user-data/conf.yml
     environment:
+      - BASE_URL=/dashy/
+      - VUE_APP_DOMAIN=/dashy/
       - NODE_ENV=production
     restart: unless-stopped
   glances: