TypeError: Cannot read property 'indexOf' of undefined
    at /root/docker-compose-app/shop-server/index.js:28:27
    at Layer.handle [as handle_request] (/root/docker-compose-app/shop-server/node_modules/express/lib/router/layer.js:95:5)
    at trim_prefix (/root/docker-compose-app/shop-server/node_modules/express/lib/router/index.js:328:13)
    at /root/docker-compose-app/shop-server/node_modules/express/lib/router/index.js:286:9
    at Function.process_params (/root/docker-compose-app/shop-server/node_modules/express/lib/router/index.js:346:12)
    at next (/root/docker-compose-app/shop-server/node_modules/express/lib/router/index.js:280:10)
    at compression (/root/docker-compose-app/shop-server/node_modules/compression/index.js:220:5)
    at Layer.handle [as handle_request] (/root/docker-compose-app/shop-server/node_modules/express/lib/router/layer.js:95:5)
    at trim_prefix (/root/docker-compose-app/shop-server/node_modules/express/lib/router/index.js:328:13)
    at /root/docker-compose-app/shop-server/node_modules/express/lib/router/index.js:286:9