phase6: Dockerfile, CI workflows, GHCR release pipeline

.dockerignore

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+.git
+.github
+.review-sandboxes
+.claude
+.agents
+.DS_Store
+.venv
+venv
+__pycache__
+*.py[cod]
+archive
+docs
+tmp
+bin
+dist
+node_modules
+web/static/dist
+.air.log
+*.md
+!README.md

.github/workflows/build.yml

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+name: build
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    env:
+      TAILWIND_VERSION: v3.4.17
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+          cache: true
+
+      - name: Install templ
+        run: go install github.com/a-h/templ/cmd/templ@v0.3.1001
+
+      - name: Install tailwindcss standalone
+        run: |
+          curl -fsSL -o /usr/local/bin/tailwindcss \
+            "https://github.com/tailwindlabs/tailwindcss/releases/download/${TAILWIND_VERSION}/tailwindcss-linux-x64"
+          chmod +x /usr/local/bin/tailwindcss
+
+      - name: Build assets
+        run: |
+          mkdir -p web/static/dist
+          templ generate ./...
+          tailwindcss -c tailwind.config.js -i web/static/src/app.css -o web/static/dist/app.css --minify
+
+      - name: Vet
+        run: go vet ./...
+
+      - name: Test
+        run: go test -race ./...
+
+      - name: Build
+        run: |
+          mkdir -p bin
+          CGO_ENABLED=0 go build -trimpath \
+            -ldflags="-s -w -X github.com/fserg/md-to-html/internal/version.Version=$(cat VERSION)" \
+            -o bin/md-to-html ./cmd/md-to-html
+
+  cross-compile:
+    needs: test
+    runs-on: ubuntu-latest
+    env:
+      TAILWIND_VERSION: v3.4.17
+
+    strategy:
+      matrix:
+        include:
+          - goos: linux
+            goarch: amd64
+          - goos: linux
+            goarch: arm64
+          - goos: darwin
+            goarch: arm64
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+
+      - name: Install templ
+        run: go install github.com/a-h/templ/cmd/templ@v0.3.1001
+
+      - name: Install tailwindcss standalone
+        run: |
+          curl -fsSL -o /usr/local/bin/tailwindcss \
+            "https://github.com/tailwindlabs/tailwindcss/releases/download/${TAILWIND_VERSION}/tailwindcss-linux-x64"
+          chmod +x /usr/local/bin/tailwindcss
+
+      - name: Build assets
+        run: |
+          mkdir -p web/static/dist
+          templ generate ./...
+          tailwindcss -c tailwind.config.js -i web/static/src/app.css -o web/static/dist/app.css --minify
+
+      - name: Cross-compile
+        env:
+          GOOS: ${{ matrix.goos }}
+          GOARCH: ${{ matrix.goarch }}
+          CGO_ENABLED: "0"
+        run: |
+          mkdir -p bin
+          go build -trimpath \
+            -ldflags="-s -w -X github.com/fserg/md-to-html/internal/version.Version=$(cat VERSION)" \
+            -o "bin/md-to-html-${GOOS}-${GOARCH}" \
+            ./cmd/md-to-html
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: md-to-html-${{ matrix.goos }}-${{ matrix.goarch }}
+          path: bin/md-to-html-${{ matrix.goos }}-${{ matrix.goarch }}
+          retention-days: 7

.github/workflows/release.yml

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+name: release
+
+on:
+  push:
+    tags:
+      - "v*"
+
+permissions:
+  contents: write
+  packages: write
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    env:
+      TAILWIND_VERSION: v3.4.17
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+
+      - name: Install templ
+        run: go install github.com/a-h/templ/cmd/templ@v0.3.1001
+
+      - name: Install tailwindcss standalone
+        run: |
+          curl -fsSL -o /usr/local/bin/tailwindcss \
+            "https://github.com/tailwindlabs/tailwindcss/releases/download/${TAILWIND_VERSION}/tailwindcss-linux-x64"
+          chmod +x /usr/local/bin/tailwindcss
+
+      - name: Build assets
+        run: |
+          mkdir -p web/static/dist
+          templ generate ./...
+          tailwindcss -c tailwind.config.js -i web/static/src/app.css -o web/static/dist/app.css --minify
+
+      - name: Cross-compile binaries
+        run: |
+          mkdir -p dist
+          for target in "linux amd64" "linux arm64" "darwin arm64"; do
+            set -- $target
+            GOOS=$1 GOARCH=$2 CGO_ENABLED=0 go build -trimpath \
+              -ldflags="-s -w -X github.com/fserg/md-to-html/internal/version.Version=$(cat VERSION)" \
+              -o "dist/md-to-html-${1}-${2}" \
+              ./cmd/md-to-html
+          done
+
+      - name: Log in to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - uses: docker/setup-qemu-action@v3
+
+      - uses: docker/setup-buildx-action@v3
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          platforms: linux/amd64,linux/arm64
+          tags: |
+            ghcr.io/${{ github.repository }}:${{ github.ref_name }}
+            ghcr.io/${{ github.repository }}:latest
+
+      - name: Create GitHub Release
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          gh release create "${{ github.ref_name }}" \
+            --title "${{ github.ref_name }}" \
+            --notes-file CHANGELOG.md \
+            dist/*

Dockerfile

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+# syntax=docker/dockerfile:1.7
+
+FROM debian:bookworm-slim AS tailwind
+
+RUN apt-get update \
+	&& apt-get install -y --no-install-recommends ca-certificates curl \
+	&& rm -rf /var/lib/apt/lists/*
+
+WORKDIR /src
+
+ARG TARGETARCH
+ARG TAILWIND_VERSION=v3.4.17
+
+RUN case "$TARGETARCH" in \
+	amd64) tailwind_arch='x64' ;; \
+	arm64) tailwind_arch='arm64' ;; \
+	*) echo "unsupported TARGETARCH: $TARGETARCH" >&2; exit 1 ;; \
+	esac \
+	&& curl -fsSL -o /usr/local/bin/tailwindcss \
+		"https://github.com/tailwindlabs/tailwindcss/releases/download/${TAILWIND_VERSION}/tailwindcss-linux-${tailwind_arch}" \
+	&& chmod +x /usr/local/bin/tailwindcss
+
+COPY tailwind.config.js ./
+COPY web/ ./web/
+COPY internal/ui/ ./internal/ui/
+
+RUN mkdir -p web/static/dist \
+	&& tailwindcss \
+		-c tailwind.config.js \
+		-i web/static/src/app.css \
+		-o web/static/dist/app.css \
+		--minify
+
+FROM golang:1.24-alpine AS build
+
+WORKDIR /src
+
+RUN apk add --no-cache ca-certificates git
+RUN go install github.com/a-h/templ/cmd/templ@v0.3.1001
+
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY . .
+COPY --from=tailwind /src/web/static/dist/app.css ./web/static/dist/app.css
+
+RUN templ generate ./... \
+	&& CGO_ENABLED=0 GOOS=linux go build \
+		-trimpath \
+		-ldflags="-s -w -X github.com/fserg/md-to-html/internal/version.Version=$(cat VERSION)" \
+		-o /out/md-to-html \
+		./cmd/md-to-html
+
+FROM gcr.io/distroless/static-debian12:nonroot
+
+COPY --from=build /out/md-to-html /md-to-html
+
+EXPOSE 8080
+
+USER nonroot
+
+ENTRYPOINT ["/md-to-html", "serve"]