build(development): do not use --hot flag as it doesn't work as expected

Author: jkuri

package.json

@@ -15,8 +15,8 @@
     "build:app": "webpack --env.dev --progress",
     "build:app:prod": "webpack --env.aot --env.prod -p",
     "build-image": "IMAGE_NAME=bleenco/abstruse:${npm_package_version}-dev DOCKER_TAG=${npm_package_version}-dev SOURCE_COMMIT=`git rev-parse HEAD` hooks/build",
-    "start": "webpack-dev-server --env.dev --env.serve --progress --hot",
-    "start:aot": "webpack-dev-server --env.aot --env.dev --env.serve --progress --hot",
+    "start": "webpack-dev-server --env.dev --env.serve --progress",
+    "start:aot": "webpack-dev-server --env.aot --env.dev --env.serve --progress",
     "lint": "tslint ./src/**/*.ts",
     "test": "node ./tests/run_unit.js",
     "test:karma": "karma start ./karma.conf.js",