A container registry that uses the AT Protocol for manifest storage and S3 for blob storage.
minify appview container
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Dockerfile.appview
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Dockerfile.appview
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# Build stage
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FROM golang:1.24-alpine AS builder
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# ==========================================
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# Stage 1: Build stage with Debian (glibc)
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# ==========================================
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FROM golang:1.25.2-trixie AS builder
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# Install build dependencies (gcc and musl-dev needed for SQLite CGO)
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RUN apk add --no-cache git make gcc musl-dev sqlite-dev
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# Install SQLite development libraries (for CGO compilation)
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RUN apt-get update && \
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apt-get install -y --no-install-recommends sqlite3 libsqlite3-dev && \
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rm -rf /var/lib/apt/lists/*
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# Set working directory
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WORKDIR /build
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# Copy go mod files
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# Copy go mod files and download dependencies (cached layer)
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COPY go.mod go.sum ./
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# Download dependencies
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RUN go mod download
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# Copy source code
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COPY . .
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# Build the binary with CGO enabled for SQLite support
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RUN CGO_ENABLED=1 GOOS=linux go build -a -o atcr-appview ./cmd/appview
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# Build optimized binary:
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# - CGO_ENABLED=1: Required for SQLite (mattn/go-sqlite3)
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# - -ldflags="-s -w": Strip debug symbols (~30% size reduction)
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# - -tags sqlite_omit_load_extension: Remove SQLite extension loading (~100KB savings)
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# - -trimpath: Remove build paths (reproducible builds)
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# SQLite is statically embedded in the binary (no runtime .so needed)
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RUN CGO_ENABLED=1 go build \
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-ldflags="-s -w" \
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-tags sqlite_omit_load_extension \
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-trimpath \
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-o atcr-appview ./cmd/appview
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# Collect minimal runtime dependencies based on ldd output
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RUN mkdir -p /runtime-deps/lib/x86_64-linux-gnu /runtime-deps/lib64 && \
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# Core glibc library (only one the binary links to)
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cp -L /lib/x86_64-linux-gnu/libc.so.6 /runtime-deps/lib/x86_64-linux-gnu/ && \
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# Dynamic linker
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cp -L /lib64/ld-linux-x86-64.so.2 /runtime-deps/lib64/ && \
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# NSS modules for DNS resolution (loaded via dlopen at runtime, not shown in ldd)
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cp -L /lib/x86_64-linux-gnu/libnss_dns.so.2 /runtime-deps/lib/x86_64-linux-gnu/ && \
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cp -L /lib/x86_64-linux-gnu/libnss_files.so.2 /runtime-deps/lib/x86_64-linux-gnu/ && \
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# NSS modules depend on libresolv
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cp -L /lib/x86_64-linux-gnu/libresolv.so.2 /runtime-deps/lib/x86_64-linux-gnu/ && \
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# Create NSS config (tells glibc to check /etc/hosts then DNS)
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echo "hosts: files dns" > /tmp/nsswitch.conf
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# ==========================================
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# Stage 2: Minimal FROM scratch runtime
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# ==========================================
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FROM scratch
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# Runtime stage
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FROM alpine:latest
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# Copy minimal glibc runtime dependencies
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COPY --from=builder /runtime-deps /
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# Install CA certificates for HTTPS, SQLite runtime libraries, and sqlite CLI for debugging
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RUN apk --no-cache add ca-certificates sqlite-libs sqlite
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# Copy NSS configuration for DNS resolution
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COPY --from=builder /tmp/nsswitch.conf /etc/nsswitch.conf
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# Set working directory
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WORKDIR /app
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# Copy CA certificates for HTTPS (PDS, Jetstream, relay connections)
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COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
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# Copy binary from builder
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COPY --from=builder /build/atcr-appview .
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# Copy timezone data for timestamp formatting
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COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
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# Create directories for storage
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RUN mkdir -p /var/lib/atcr/blobs /var/lib/atcr/auth
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# Copy optimized binary (SQLite embedded)
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COPY --from=builder /build/atcr-appview /atcr-appview
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# Expose ports
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EXPOSE 5000 5001
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# Expose port (main HTTP server)
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EXPOSE 5000
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# OCI image annotations
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LABEL org.opencontainers.image.title="ATCR AppView" \
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io.atcr.icon="https://imgs.blue/evan.jarrett.net/1TpTNrRelfloN2emuWZDrWmPT0o93bAjEnozjD6UPgoVV9m4"
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# Run the AppView (no config file - uses environment variables)
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ENTRYPOINT ["/app/atcr-appview"]
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# Creates /var/lib/atcr directories on first run via Go code
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ENTRYPOINT ["/atcr-appview"]
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CMD ["serve"]