Add heroku-postbuild script and split dependencies and devDependencies

package.json

@@ -8,7 +8,8 @@
     "build": "npm run build:frontend && npm run build:backend",
     "build:frontend": "NODE_ENV=production node ./node_modules/webpack/bin/webpack --bail --progress --config webpack.frontend.config.js",
     "build:backend": "NODE_ENV=production node ./node_modules/webpack/bin/webpack --bail --progress --config webpack.backend.config.js",
-    "lint": "./node_modules/.bin/eslint --fix src"
+    "lint": "./node_modules/.bin/eslint --fix src",
+    "heroku-postbuild": "npm run build"
   },
   "repository": {
     "type": "git",
@@ -24,6 +25,17 @@
     "url": "https://jasonpark.me/"
   },
   "license": "MIT",
+  "dependencies": {
+    "express": "^4.15.4",
+    "morgan": "^1.9.1",
+    "cookie-parser": "^1.4.3",
+    "body-parser": "^1.18.2",
+    "bluebird": "latest",
+    "axios": "latest",
+    "fs-extra": "^6.0.1",
+    "express-github-webhook": "^1.0.6",
+    "uuid": "^3.2.1"
+  },
   "devDependencies": {
     "@fortawesome/fontawesome": "^1.1.5",
     "@fortawesome/fontawesome-free-brands": "^5.0.9",
@@ -31,7 +43,6 @@
     "@fortawesome/fontawesome-svg-core": "^1.2.0",
     "@fortawesome/react-fontawesome": "0.1.0",
     "autoprefixer": "latest",
-    "axios": "latest",
     "axios-progress-bar": "^1.1.8",
     "babel-core": "^6.18.0",
     "babel-loader": "^7.1.2",
@@ -42,14 +53,11 @@
     "babel-preset-react": "^6.24.1",
     "babel-preset-react-hmre": "^1.1.1",
     "babel-preset-stage-3": "^6.24.1",
-    "bluebird": "latest",
-    "body-parser": "^1.18.2",
     "brace": "latest",
     "chart.js": "^2.7.2",
     "clean-webpack-plugin": "^0.1.16",
     "compression": "latest",
     "connect-history-api-fallback": "^1.3.0",
-    "cookie-parser": "^1.4.3",
     "copy-webpack-plugin": "^4.0.1",
     "css-hot-loader": "^1.3.9",
     "css-loader": "^1.0.0",
@@ -58,15 +66,11 @@
     "eslint-plugin-import": "^2.11.0",
     "eslint-plugin-jsx-a11y": "^6.0.3",
     "eslint-plugin-react": "^7.7.0",
-    "express": "^4.15.4",
-    "express-github-webhook": "^1.0.6",
-    "fs-extra": "^6.0.1",
     "html-webpack-plugin": "^3.2.0",
     "http-proxy-middleware": "^0.18.0",
     "imagemin-webpack-plugin": "^2.3.0",
     "js-cookie": "^2.2.0",
     "mini-css-extract-plugin": "^0.4.0",
-    "morgan": "^1.9.1",
     "node-sass": "^4.5.3",
     "postcss-flexboxfixer": "0.0.5",
     "postcss-loader": "^2.0.6",
@@ -91,7 +95,6 @@
     "screenfull": "^3.3.2",
     "style-loader": "^0.21.0",
     "uglifyjs-webpack-plugin": "^1.2.4",
-    "uuid": "^3.2.1",
     "webpack": "^4.5.0",
     "webpack-bundle-analyzer": "^2.11.1",
     "webpack-cli": "^3.0.8",