created ci workflow running esLint on every Push or PR to main (#19)

* created ci workflow running esLint on every Push or PR to main

* updated yarn

* Fixed the build error by removing the unused imported function which was never created

.github/workflows/ci.yml

@@ -0,0 +1,32 @@
+name: ci
+
+# This workflow will run whenever we push commits to the `main` branch, or
+# whenever there's a pull request to the `main` branch. See:
+# https://docs.github.com/en/actions/learn-github-actions/workflow-syntax-for-github-actions#on
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+
+jobs:
+  lint:
+    name: ESLint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v3
+
+      - name: Setup node
+        uses: actions/setup-node@v3
+        with:
+          node-version: '18'
+          cache: 'npm'
+
+      - name: Install node dependencies
+        run: npm ci
+
+      - name: Run ESLint
+        run: npm run lint