devex: create github action (#3)

.github/workflows/deno.yml

@@ -0,0 +1,36 @@
+name: Format, Lint, and Compile
+
+on:
+  push:
+    branches: ["master"]
+  pull_request:
+    branches: ["master"]
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Setup repo
+        uses: actions/checkout@v3
+
+      - name: Setup Deno
+        # uses: denoland/setup-deno@v1
+        uses: denoland/setup-deno@61fe2df320078202e33d7d5ad347e7dcfa0e8f31  # v1.1.2
+        with:
+          deno-version: v1.x
+
+      - name: Verify formatting
+        run: deno fmt --check
+
+      - name: Run linter
+        run: deno lint
+
+      # - name: Run tests
+      #   run: deno test -A
+
+      - name: Compile binary
+        run: deno compile media_downloader.ts