chore: Reduce idle CPU usage in development

package.json

@@ -10,7 +10,7 @@
     "build:webpack": "webpack --config webpack.config.prod.js",
     "build": "yarn clean && yarn build:webpack && yarn build:i18n && yarn build:server",
     "start": "node ./build/server/index.js",
-    "dev": "nodemon --exec \"yarn build:server && yarn build:i18n && node --inspect=0.0.0.0 build/server/index.js\" -e js --ignore build/ --ignore app/",
+    "dev": "nodemon --exec \"yarn build:server && yarn build:i18n && node --inspect=0.0.0.0 build/server/index.js\" -e js --ignore build/ --ignore app/ --ignore flow-typed/",
     "lint": "eslint app server shared",
     "deploy": "git push heroku master",
     "postinstall": "yarn yarn-deduplicate yarn.lock",
@@ -212,4 +212,4 @@
     "js-yaml": "^3.13.1"
   },
   "version": "0.57.0"
-}
+}

server/app.js

@@ -74,12 +74,9 @@ if (isProduction) {
     // display nothing to the console
     quiet: false,
 
-    // switch into lazy mode
-    // that means no watching, but recompilation on every request
-    lazy: false,
-
     watchOptions: {
-      ignored: ["node_modules"],
+      poll: 1000,
+      ignored: ["node_modules", "flow-typed", "server", "build", "__mocks__"],
     },
 
     // public path to bind the middleware to