add linter

Author: rindrajosia

.babelrc

@@ -0,0 +1 @@
+{ "presets": ["@babel/preset-env"] } 

.eslintrc.json

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+{
+  "env": {
+    "browser": true,
+    "es6": true,
+    "jest": true
+  },
+  "parser": "babel-eslint",
+  "parserOptions": {
+    "ecmaVersion": 2018,
+    "sourceType": "module"
+  },
+  "extends": ["airbnb-base"],
+  "rules": {
+    "no-shadow": "off",
+    "no-param-reassign": "off",
+    "eol-last": "off",
+    "arrow-parens": "off"
+  },
+  "ignorePatterns": [
+    "dist/",
+    "build/"
+  ]
+}

.github/workflows/linters.yml

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+name: Linters
+
+on: pull_request
+
+env:
+  FORCE_COLOR: 1
+
+jobs:
+  eslint:
+    name: ESLint
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: "12.x"
+      - name: Setup ESLint
+        run: |
+          npm install --save-dev eslint@6.8.x eslint-config-airbnb-base@14.1.x eslint-plugin-import@2.20.x babel-eslint@10.1.x
+          [ -f .eslintrc.json ] || wget https://raw.githubusercontent.com/microverseinc/linters-config/master/javascript/.eslintrc.json
+      - name: ESLint Report
+        run: npx eslint .
+  stylelint:
+    name: Stylelint
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: "12.x"
+      - name: Setup Stylelint
+        run: |
+          npm install --save-dev stylelint@13.3.x stylelint-scss@3.17.x stylelint-config-standard@20.0.x stylelint-csstree-validator
+          [ -f .stylelintrc.json ] || wget https://raw.githubusercontent.com/microverseinc/linters-config/master/javascript/.stylelintrc.json
+      - name: Stylelint Report
+        run: npx stylelint "**/*.{css,scss}"

.stylelintrc.json

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+{
+  "extends": ["stylelint-config-standard"],
+  "plugins": ["stylelint-scss", "stylelint-csstree-validator"],
+  "rules": {
+    "at-rule-no-unknown": null,
+    "scss/at-rule-no-unknown": true,
+    "csstree/validator": true
+  },
+  "ignoreFiles": ["build/**", "dist/**", "**/reset*.css", "**/bootstrap*.css"]
+}