Buildx latest on master branch changes

.github/workflows/buildx-latest.yml

@@ -0,0 +1,39 @@
+name: Buildx latest
+on:
+  release:
+    types: [published]
+    paths-ignore:
+      - .github/workflows/build.yml
+      - .github/workflows/buildx-branch.yml
+      - .github/workflows/buildx-release.yml
+      - .github/workflows/dockerhub-description.yml
+      - .github/workflows/rust.yml
+      - extra
+      - _config.yml
+      - .gitignore
+      - .rustfmt.toml
+      - .gitignore
+      - example.json
+      - LICENSE
+      - README.md
+jobs:
+  buildx:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Buildx setup
+        uses: crazy-max/ghaction-docker-buildx@v1
+      - name: Dockerhub login
+        run: echo ${{ secrets.DOCKERHUB_PASSWORD }} | docker login -u mindflavor --password-stdin 2>&1
+      - name: Run Buildx
+        run: |
+          docker buildx build \
+            --progress plain \
+            --platform=linux/amd64,linux/386 \
+            --build-arg BUILD_DATE=`date -u +"%Y-%m-%dT%H:%M:%SZ"` \
+            --build-arg COMMIT=`git rev-parse --short HEAD` \
+            --build-arg VERSION=latest \
+            -t mindflavor/prometheus-wireguard-exporter:latest \
+            --push \
+            .
+      - run: curl -X POST https://hooks.microbadger.com/images/mindflavor/prometheus-wireguard-exporter/TODO || exit 0