Optimize Docker builds: Add .dockerignore, improve caching, and enhance Dockerfile structure

.dockerignore

@@ -1,6 +1,40 @@
-.github
+# Build artifacts
+runner
+worker
+
+# Version control
 .git
+.gitignore
+
+# CI/CD
+.github
+.gitlab-ci.yml
+
+# Documentation
+*.md
+README*
+docs/
+
+# Tests
+*_test.go
+**/*_test.go
+
+# Development
+.env
+.env.*
+*.log
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+.DS_Store
+
+# Kubernetes/Deployment
 charts/
 deployment.yaml
-runner
-worker
+kubernetes/
+
+# Project-specific
+Makefile

.github/workflows/docker-publish.yml

@@ -1,50 +1,44 @@
 name: Docker
-
 on:
   push:
-    branches: [ "main" ]
+    branches: ["main"]
     # Publish semver tags as releases.
-    tags: [ 'v*.*.*' ]
+    tags: ['v*.*.*']
   pull_request:
-    branches: [ "main" ]
-
+    branches: ["main"]
 env:
   REGISTRY: ghcr.io
   IMAGE_NAME: ${{ github.repository }}
-
 jobs:
   build-and-push-image:
     runs-on: ubuntu-latest
     permissions:
       contents: read
       packages: write
-
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3
-
-      - name: Setup Docker buildx
-        uses: docker/setup-buildx-action@v2.4.1
-
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
       - name: Log into registry ${{ env.REGISTRY }}
         if: github.event_name != 'pull_request'
         uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
-
       - name: Extract metadata (tags, labels) for Docker
         id: meta
         uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
-
       - name: Build and push Docker image
-        uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
+        uses: docker/build-push-action@v6
         with:
           context: .
           platforms: linux/amd64,linux/arm64
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

Dockerfile

@@ -1,16 +1,25 @@
+# Build stage
 FROM golang:1.23 AS builder
 
 WORKDIR /usr/src/worker
 
+# Copy dependency manifests
 COPY go.mod go.sum ./
-RUN go mod download && go mod verify
 
+# Install dependencies
+RUN --mount=type=cache,target=/go/pkg/mod go mod download && go mod verify
+
+# Copy source code
 COPY . .
-RUN CGO_ENABLED=0 go build -v -o /usr/local/bin/worker ./cmd/worker
-RUN CGO_ENABLED=0 go build -v -o /usr/local/bin/runner ./cmd/runner
 
+# Build binaries
+RUN CGO_ENABLED=0 go build -v -o /usr/local/bin/worker ./cmd/worker && \
+    CGO_ENABLED=0 go build -v -o /usr/local/bin/runner ./cmd/runner
+
+# Runtime stage
 FROM scratch
 
+# Copy binaries from builder
 COPY --from=builder /usr/local/bin/worker /usr/local/bin/worker
 COPY --from=builder /usr/local/bin/runner /usr/local/bin/runner