Adding github workflow

.github/actions/install-dependencies/action.yml

@@ -0,0 +1,36 @@
+name: Setup Node and PNPM dependencies
+
+runs:
+  using: 'composite'
+
+  steps:
+    - name: Setup PNPM
+      uses: pnpm/action-setup@v2
+      with:
+        version: 8
+        run_install: false
+
+    - name: Get pnpm store directory
+      id: pnpm-cache
+      shell: bash
+      run: |
+        echo "STORE_PATH=$(pnpm store path)" >> $GITHUB_OUTPUT
+
+    - name: Setup pnpm cache
+      uses: actions/cache@v3
+      with:
+        path: |
+          ${{ steps.pnpm-cache.outputs.STORE_PATH }}
+        key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
+        restore-keys: |
+          ${{ runner.os }}-pnpm-store-
+
+    - name: Setup Node
+      uses: actions/setup-node@v3
+      with:
+        node-version: 18
+
+    - name: Install dependencies
+      shell: bash
+      run: pnpm install --frozen-lockfile
+      if: ${{ steps.pnpm-cache.outputs.cache-hit != 'true' }}

.github/workflows/ci.yml

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+name: CI
+
+on: [push]
+
+jobs:
+  build:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Install dependencies
+        uses: ./.github/actions/install-dependencies
+
+      - name: Typecheck
+        run: pnpm typecheck
+
+      - name: Lint
+        run: pnpm lint
+
+      - name: Build
+        run: pnpm build
+
+      - name: Test
+        run: pnpm test