ADD: Dependencies and Linter config

.eslintrc.js

@@ -0,0 +1,21 @@
+module.exports = {
+  env: {
+    es6: true,
+    node: true,
+  },
+  extends: ['eslint:recommended', 'plugin:react/recommended'],
+  parserOptions: {
+    ecmaFeatures: {
+      experimentalObjectRestSpread: true,
+      jsx: true,
+    },
+    sourceType: 'module',
+  },
+  plugins: ['react', 'eslint-plugin-react'],
+  rules: {
+    indent: ['error', 2],
+    'linebreak-style': ['error', 'unix'],
+    quotes: ['error', 'single'],
+    semi: ['error', 'always'],
+  },
+};

package.json

@@ -5,13 +5,16 @@
   "dependencies": {
     "react": "^16.6.3",
     "react-dom": "^16.6.3",
+    "react-router": "^4.3.1",
+    "react-router-dom": "^4.3.1",
     "react-scripts": "2.1.1"
   },
   "scripts": {
     "start": "react-scripts start",
     "build": "react-scripts build",
     "test": "react-scripts test",
-    "eject": "react-scripts eject"
+    "eject": "react-scripts eject",
+    "clean": "rm -rf node_modules/ && rm yarn.lock && yarn install"
   },
   "eslintConfig": {
     "extends": "react-app"
@@ -21,5 +24,8 @@
     "not dead",
     "not ie <= 11",
     "not op_mini all"
-  ]
+  ],
+  "devDependencies": {
+    "eslint-plugin-react": "^7.11.1"
+  }
 }