Fix SSR server env problems

package.json

@@ -30,7 +30,7 @@
     "mock-backend": "json-server --watch db.json -H 0.0.0.0 -p 1234",
     "test": "npm-run-all lint test:e2e",
     "test:e2e": "npm-run-all -s build test:e2e:run",
-    "test:e2e:run": "npm-run-all -p -r mock-backend serve test:e2e:testcafe",
+    "test:e2e:run": "npm-run-all -p -r serve test:e2e:testcafe",
     "test:e2e:testcafe": "testcafe -S -s 'tests/testcafe/screenshots' --app-init-delay 2000 chrome tests/testcafe",
     "plop": "plop"
   },
@@ -52,6 +52,7 @@
     "babel-preset-react": "^6.24.1",
     "compression": "^1.7.3",
     "css-loader": "^0.28.11",
+    "dotenv": "^6.2.0",
     "dotenv-webpack": "^1.5.7",
     "express": "^4.16.3",
     "favicons-webpack-plugin": "0.0.9",