feat: add deployment workflow

.github/workflows/deploy.yml

@@ -0,0 +1,47 @@
+name: Deploy
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    strategy:
+      fail-fast: false
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@d70bba72b1f3fd22344832f00baa16ece964efeb # v3
+
+      - name: Create a tagname
+        id: tagname
+        run: |
+          echo "tagname=$(git rev-parse --short HEAD)-$(date +%Y%m%d)-$(date +%H%M)" >> $GITHUB_ENV
+
+      - name: Build & Tag Images
+        run: |
+          docker build . \
+          --tag registry.digitalocean.com/${{ secrets.DOCR_NAME }}/org/hashnode-preview:$tagname \
+          --tag registry.digitalocean.com/${{ secrets.DOCR_NAME }}/org/hashnode-preview:latest
+
+      - name: Install doctl
+        uses: digitalocean/action-doctl@v2
+        with:
+          token: ${{ secrets.DIGITALOCEAN_ACCESS_TOKEN }}
+
+      - name: Log in to DigitalOcean Container Registry with short-lived credentials
+        run: doctl registry login --expiry-seconds 1200
+
+      - name: Push image to DigitalOcean Container Registry
+        run: |
+          docker push --all-tags registry.digitalocean.com/${{ secrets.DOCR_NAME }}/org/hashnode-preview