ci: add dockerhub push pipeline on manual runs and on tag releases

Author: tharropoulos

.github/workflows/release-docker.yml

@@ -0,0 +1,66 @@
+name: Release Docker images
+
+on:
+  push:
+    tags:
+      - "*"
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set tag
+        run: |
+          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
+            git fetch --tags --force
+            latest_tag=$(git tag --sort=version:refname | tail -n 1)
+            if [ -z "$latest_tag" ]; then
+              echo "No git tags found; cannot determine latest tag."
+              exit 1
+            fi
+            echo "TAG=${latest_tag}" >> "$GITHUB_ENV"
+          else
+            echo "TAG=${{ github.ref_name }}" >> "$GITHUB_ENV"
+          fi
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push base image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ./scraper/dev/docker/Dockerfile.base
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: |
+            typesense/docsearch-scraper-base:${{ env.TAG }}
+            typesense/docsearch-scraper-base:latest
+
+      - name: Build and push scraper image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ./scraper/dev/docker/Dockerfile
+          platforms: linux/amd64,linux/arm64
+          push: true
+          build-args: |
+            SCRAPER_BASE_VERSION=${{ env.TAG }}
+          tags: |
+            typesense/docsearch-scraper:${{ env.TAG }}
+            typesense/docsearch-scraper:latest