Add linter and GHA workflow config

.github/workflows/linters.yml

@@ -0,0 +1,36 @@
+name: Linters
+
+on: pull_request
+
+env:
+  FORCE_COLOR: 1
+
+jobs:
+  rubocop:
+    name: Rubocop
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-ruby@v1
+        with:
+          ruby-version: 2.6.x
+      - name: Setup Rubocop
+        run: |
+          gem install --no-document rubocop:'~>0.81.0' # https://docs.rubocop.org/en/stable/installation/
+          [ -f .rubocop.yml ] || wget https://raw.githubusercontent.com/microverseinc/linters-config/master/ror/.rubocop.yml
+      - name: Rubocop Report
+        run: rubocop --color
+  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 [email protected] [email protected] [email protected]
+          [ -f .stylelintrc.json ] || wget https://raw.githubusercontent.com/microverseinc/linters-config/master/ror/.stylelintrc.json
+      - name: Stylelint Report
+        run: npx stylelint "**/*.{css,scss}"

.stylelintrc.json

@@ -0,0 +1,15 @@
+
+{
+    "extends": ["stylelint-config-standard"],
+    "plugins": ["stylelint-scss"],
+    "rules": {
+      "at-rule-no-unknown": null,
+      "scss/at-rule-no-unknown": true
+    },
+    "ignoreFiles": [
+      "build/**",
+      "dist/**",
+      "**/reset*.css",
+      "**/bootstrap*.css"
+    ]
+  }