ci: add dockerize action

.github/workflows/dockerize.yml

@@ -0,0 +1,30 @@
+name: dockerize
+
+on:
+  push:
+    tags:
+      - 'v[0-9]+.[0-9]+.[0-9]+'
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Generate Docker metadata
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: 'docker.io/huanttok/dynamic-thumbnail-service-v2'
+          tags: |
+            type=semver,pattern={{major}}.{{minor}}.{{patch}}
+          flavor: |
+            latest=true
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Build and push
+        uses: docker/build-push-action@v3
+        with:
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}