Initial commit

.dockerignore

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+.git
+.idea

.github/workflows/docker-compose-publish.yml

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+name: Docker Build & Push on release
+
+on:
+  push:
+    branches: [ release ]
+    tags: [ 'v*.*.*' ]
+  workflow_dispatch:
+
+env:
+  REGISTRY: ghcr.io
+  # github.repository as <account>/<repo>
+  IMAGE_NAME: ${{ github.repository }}
+  DOCKER_BUILDKIT: 1
+  COMPOSE_DOCKER_CLI_BUILD: 1
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Cache Docker layers
+        uses: actions/cache@v2
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-buildx-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-
+
+      # Login against a Docker registry except on PR
+      # https://github.com/docker/login-action
+      - name: Log into registry ${{ env.REGISTRY }}
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@28218f9b04b4f3f62068d7b6ce6ca5b26e35336c
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      # TODO: pull
+      - name: docker/build-push-action
+        uses: docker/build-push-action@v2
+        with:
+          context: ./app1
+          file: ./app1/Dockerfile
+          load: true
+          push: false
+          builder: ${{ steps.buildx.outputs.name }}
+          tags: ${{ env.REGISTRY }}/${{ github.repository }}_app1:${{ github.event.release.tag_name }}
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,mode=max,dest=/tmp/.buildx-cache-new
+
+      - name: docker/build-push-action
+        uses: docker/build-push-action@v2
+        with:
+          context: ./app2
+          file: ./app2/Dockerfile
+          load: true
+          push: false
+          builder: ${{ steps.buildx.outputs.name }}
+          tags: ${{ env.REGISTRY }}/${{ github.repository }}_app2:${{ github.event.release.tag_name }}
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,mode=max,dest=/tmp/.buildx-cache-new
+
+      - name: Build the stack
+        run: docker-compose build --build-arg BUILDKIT_INLINE_CACHE=1
+
+      - name: Push the stack
+        run: docker-compose push
+
+      - name: Move cache
+        run: |
+          rm -rf /tmp/.buildx-cache
+          mv /tmp/.buildx-cache-new /tmp/.buildx-cache

.gitignore

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+*.log
+docker-compose.override.yml
+
+# Project exclude paths
+/app1/node_modules/
+/app2/node_modules/

README.md

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+Docker Compose + Github Actions + Layers Cache
+===
+
+Example project

app1/.dockerignore

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+node_modules
+cache

app1/Dockerfile

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+FROM node:lts-alpine
+
+WORKDIR /opt/project
+
+COPY package*.json ./
+RUN npm ci --only=production
+
+COPY --chown=node:node . .
+
+USER node
+
+CMD [ "npm", "start" ]

app1/index.js

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+const fastify = require('fastify')({
+    logger: true
+})
+
+fastify.get('/', async (request, reply) => {
+    return { hello: 'world' }
+})
+
+const start = async () => {
+    try {
+        await fastify.listen(process.env.PORT)
+    } catch (err) {
+        fastify.log.error(err)
+        process.exit(1)
+    }
+}
+
+start()