Add Docker image workflow

.github/workflows/docker-image.yml

@@ -0,0 +1,32 @@
+name: Publish Docker image
+
+on:
+  push:
+    branches: [main]
+
+jobs:
+  push_to_registry:
+    name: Push Docker image to the registry
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v4
+      
+      - name: Log in to Docker Hub
+        uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a
+        with:
+          registry: gitea.antonlyap.pp.ua
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+      
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          platforms: |
+            linux/arm64
+            linux/amd64
+          tags: |
+            gitea.antonlyap.pp.ua/antonlyap/ffmpeg-min:6.1
+            gitea.antonlyap.pp.ua/antonlyap/ffmpeg-min:${{ github.sha }}