CI: lnbits-boltz docker, for those who want instant payments + boltz funding source UX tweak (#3192)

Co-authored-by: jackstar12 <62219658+jackstar12@users.noreply.github.com>
Co-authored-by: Vlad Stan <stan.v.vlad@gmail.com>
Co-authored-by: dni ⚡ <office@dnilabs.com>

.github/workflows/docker.yml

@@ -51,3 +51,14 @@ jobs:
             platforms: linux/amd64,linux/arm64
             cache-from: type=local,src=/tmp/.buildx-cache
             cache-to: type=local,dest=/tmp/.buildx-cache
+
+      - name: Build and push boltz
+        uses: docker/build-push-action@v5
+        with:
+            context: .
+            file: Dockerfile.boltz
+            push: true
+            tags: ${{ secrets.DOCKER_USERNAME }}/lnbits-boltz:${{ inputs.tag }}
+            platforms: linux/amd64,linux/arm64
+            cache-from: type=local,src=/tmp/.buildx-cache
+            cache-to: type=local,dest=/tmp/.buildx-cache