Add Dockerhub image push

.github/workflows/dockerhub-push.yaml

@@ -0,0 +1,46 @@
+name: build-push
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - 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 App
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          file: "./app/Dockerfile"
+          tags: ${{ secrets.DOCKERHUB_USERNAME }}/meshtastic-map:latest
+
+      - name: Build and push API
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          file: "./api/Dockerfile"
+          tags: ${{ secrets.DOCKERHUB_USERNAME }}/meshtastic-map-api:latest
+
+      - name: Build and push MQTT listener
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          file: "./mqtt/Dockerfile"
+          tags: ${{ secrets.DOCKERHUB_USERNAME }}/meshtastic-map-mqtt:latest