Publish to container registries workflow (sparfenyuk/mcp-proxy)

The Publish to container registries workflow from sparfenyuk/mcp-proxy, explained and optimized by Latchkey.

CI health: C - fair

Point runs-on at Latchkey and get run de-duplication, job timeouts, self-healing for flaky steps, and up to 58% lower cost, applied automatically.

Grade your own workflow free or run it on Latchkey →

Source: sparfenyuk/mcp-proxy.github/workflows/cd.yamlLicense MITView source

What it does

This is the Publish to container registries workflow from the sparfenyuk/mcp-proxy repository, a real project running GitHub Actions. It is shown here with attribution under its MIT license.

Below, Latchkey shows a faster, safer version produced by its optimization engine.

The workflow

workflow (.yml)

name: Publish to container registries

on:
  release:
    types: [published]
  workflow_dispatch:
  push:
    branches:
      - main
    paths:
      - src/**
      - Dockerfile
      - pyproject.toml
  pull_request:
    paths:
      - src/**
      - Dockerfile
      - pyproject.toml

jobs:
  docker-hub:
    name: Push multi-arch Docker image to Docker Hub
    runs-on: ubuntu-latest
    permissions:
      contents: read

    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

      - name: Set up QEMU
        uses: docker/setup-qemu-action@ce360397dd3f832beb865e1373c09c0e9f86d70a #v4.0.0

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd #v4.0.0

      - name: Extract tags and labels for Docker
        id: meta
        uses: docker/metadata-action@030e881283bb7a6894de51c315a6bfe6a94e05cf # v6.0.0
        with:
          images: sparfenyuk/mcp-proxy
          tags: |
            type=sha,format=short,prefix=commit-
            type=ref,event=tag
          labels: |
            org.opencontainers.image.authors=Sergey Parfenyuk
            org.opencontainers.image.source=https://github.com/sparfenyuk/mcp-proxy
            org.opencontainers.image.url=https://github.com/sparfenyuk/mcp-proxy
            org.opencontainers.image.title=mcp-proxy
            org.opencontainers.image.description=Connect to MCP servers that run on SSE transport, or expose stdio servers as an SSE server using the MCP Proxy server.
            org.opencontainers.image.licenses=MIT
            org.opencontainers.image.base.name=docker.io/library/python:3.13-alpine

      - name: Log in to Docker Hub
        uses: docker/login-action@4907a6ddec9925e35a0a9e82d7399ccc52663121 # v4.1.0
        if: github.event_name != 'pull_request'
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      - name: Build and push Docker image
        uses: docker/build-push-action@bcafcacb16a39f128d818304e6c9c0c18556b85f # v7.1.0
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          annotations: ${{ steps.meta.outputs.annotations }}
          cache-from: type=local,src=/tmp/.buildx-cache
          cache-to: type=local,dest=/tmp/.buildx-cache

      - name: Clean Docker cache
        if: github.event_name != 'pull_request'
        run: |
          docker system prune --force

  ghcr-io:
    name: Push multi-arch Docker image to ghcr.io
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

      - name: Set up QEMU
        uses: docker/setup-qemu-action@ce360397dd3f832beb865e1373c09c0e9f86d70a #v4.0.0

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd #v4.0.0

      - name: Extract tags and labels for Docker
        id: meta
        uses: docker/metadata-action@030e881283bb7a6894de51c315a6bfe6a94e05cf # v6.0.0
        with:
          images: ghcr.io/sparfenyuk/mcp-proxy
          tags: |
            type=sha,format=short,prefix=commit-
            type=ref,event=tag
          labels: |
            org.opencontainers.image.authors=Sergey Parfenyuk
            org.opencontainers.image.source=https://github.com/sparfenyuk/mcp-proxy
            org.opencontainers.image.url=https://github.com/sparfenyuk/mcp-proxy
            org.opencontainers.image.title=mcp-proxy
            org.opencontainers.image.description=Connect to MCP servers that run on SSE transport, or expose stdio servers as an SSE server using the MCP Proxy server.
            org.opencontainers.image.licenses=MIT
            org.opencontainers.image.base.name=docker.io/library/python:3.13-alpine

      - name: Log in to GHCR
        uses: docker/login-action@4907a6ddec9925e35a0a9e82d7399ccc52663121 # v4.1.0
        if: github.event_name != 'pull_request'
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and push Docker image
        uses: docker/build-push-action@bcafcacb16a39f128d818304e6c9c0c18556b85f # v7.1.0
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          annotations: ${{ steps.meta.outputs.annotations }}
          cache-from: type=local,src=/tmp/.buildx-cache
          cache-to: type=local,dest=/tmp/.buildx-cache

      - name: Clean Docker cache
        if: github.event_name != 'pull_request'
        run: |
          docker system prune --force

The same workflow, on Latchkey

Removes redundant runs and caps runaway jobs. Added and changed lines are highlighted.

name: Publish to container registries
 
on:
  release:
    types: [published]
  workflow_dispatch:
  push:
    branches:
      - main
    paths:
      - src/**
      - Dockerfile
      - pyproject.toml
  pull_request:
    paths:
      - src/**
      - Dockerfile
      - pyproject.toml
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  docker-hub:
    timeout-minutes: 30
    name: Push multi-arch Docker image to Docker Hub
    runs-on: latchkey-small
    permissions:
      contents: read
 
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
      - name: Set up QEMU
        uses: docker/setup-qemu-action@ce360397dd3f832beb865e1373c09c0e9f86d70a #v4.0.0
 
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd #v4.0.0
 
      - name: Extract tags and labels for Docker
        id: meta
        uses: docker/metadata-action@030e881283bb7a6894de51c315a6bfe6a94e05cf # v6.0.0
        with:
          images: sparfenyuk/mcp-proxy
          tags: |
            type=sha,format=short,prefix=commit-
            type=ref,event=tag
          labels: |
            org.opencontainers.image.authors=Sergey Parfenyuk
            org.opencontainers.image.source=https://github.com/sparfenyuk/mcp-proxy
            org.opencontainers.image.url=https://github.com/sparfenyuk/mcp-proxy
            org.opencontainers.image.title=mcp-proxy
            org.opencontainers.image.description=Connect to MCP servers that run on SSE transport, or expose stdio servers as an SSE server using the MCP Proxy server.
            org.opencontainers.image.licenses=MIT
            org.opencontainers.image.base.name=docker.io/library/python:3.13-alpine
 
      - name: Log in to Docker Hub
        uses: docker/login-action@4907a6ddec9925e35a0a9e82d7399ccc52663121 # v4.1.0
        if: github.event_name != 'pull_request'
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}
 
      - name: Build and push Docker image
        uses: docker/build-push-action@bcafcacb16a39f128d818304e6c9c0c18556b85f # v7.1.0
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          annotations: ${{ steps.meta.outputs.annotations }}
          cache-from: type=local,src=/tmp/.buildx-cache
          cache-to: type=local,dest=/tmp/.buildx-cache
 
      - name: Clean Docker cache
        if: github.event_name != 'pull_request'
        run: |
          docker system prune --force
 
  ghcr-io:
    timeout-minutes: 30
    name: Push multi-arch Docker image to ghcr.io
    runs-on: latchkey-small
    permissions:
      contents: read
      packages: write
 
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
      - name: Set up QEMU
        uses: docker/setup-qemu-action@ce360397dd3f832beb865e1373c09c0e9f86d70a #v4.0.0
 
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd #v4.0.0
 
      - name: Extract tags and labels for Docker
        id: meta
        uses: docker/metadata-action@030e881283bb7a6894de51c315a6bfe6a94e05cf # v6.0.0
        with:
          images: ghcr.io/sparfenyuk/mcp-proxy
          tags: |
            type=sha,format=short,prefix=commit-
            type=ref,event=tag
          labels: |
            org.opencontainers.image.authors=Sergey Parfenyuk
            org.opencontainers.image.source=https://github.com/sparfenyuk/mcp-proxy
            org.opencontainers.image.url=https://github.com/sparfenyuk/mcp-proxy
            org.opencontainers.image.title=mcp-proxy
            org.opencontainers.image.description=Connect to MCP servers that run on SSE transport, or expose stdio servers as an SSE server using the MCP Proxy server.
            org.opencontainers.image.licenses=MIT
            org.opencontainers.image.base.name=docker.io/library/python:3.13-alpine
 
      - name: Log in to GHCR
        uses: docker/login-action@4907a6ddec9925e35a0a9e82d7399ccc52663121 # v4.1.0
        if: github.event_name != 'pull_request'
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
 
      - name: Build and push Docker image
        uses: docker/build-push-action@bcafcacb16a39f128d818304e6c9c0c18556b85f # v7.1.0
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          annotations: ${{ steps.meta.outputs.annotations }}
          cache-from: type=local,src=/tmp/.buildx-cache
          cache-to: type=local,dest=/tmp/.buildx-cache
 
      - name: Clean Docker cache
        if: github.event_name != 'pull_request'
        run: |
          docker system prune --force

What changed

Run on Latchkey managed runners with one line (runs-on), which apply the fixes below automatically and self-heal transient failures. This example uses latchkey-small; pick the runner size that fits the job.
Cancel superseded runs when a branch or PR gets a newer push.
Add a job timeout so a hung step cannot burn hours of runner time.

What Latchkey heals here

This workflow has steps that commonly fail on transient issues (network, registries, flaky browsers). On Latchkey managed runners they are detected, retried, and self-healed instead of failing your build:

Container pulls and builds

This workflow runs 2 jobs per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.

Actions used in this workflow

actions/checkout docker/setup-qemu-action docker/setup-buildx-action docker/metadata-action docker/login-action docker/build-push-action