Initial scaffold: certificate control plane v0.1.0

Dockerfile

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+# Multi-stage build for certctl server and agent binaries
+# Stage 1: Build
+FROM golang:1.22-alpine AS builder
+
+# Install build dependencies
+RUN apk add --no-cache git ca-certificates tzdata
+
+# Set working directory
+WORKDIR /app
+
+# Copy go mod and sum files
+COPY go.mod go.sum ./
+
+# Download dependencies
+RUN go mod download
+
+# Copy source code
+COPY . .
+
+# Build server binary
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build \
+    -ldflags="-w -s" \
+    -o bin/server \
+    ./cmd/server
+
+# Build agent binary
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build \
+    -ldflags="-w -s" \
+    -o bin/agent \
+    ./cmd/agent
+
+# Stage 2: Runtime
+FROM alpine:3.19
+
+# Install runtime dependencies
+RUN apk add --no-cache ca-certificates tzdata curl
+
+# Create non-root user
+RUN addgroup -g 1000 certctl && \
+    adduser -D -u 1000 -G certctl certctl
+
+# Set working directory
+WORKDIR /app
+
+# Copy binaries from builder
+COPY --from=builder /app/bin/server .
+COPY --from=builder /app/bin/agent .
+
+# Copy migration files if needed
+COPY --chown=certctl:certctl migrations/ ./migrations/
+
+# Change ownership
+RUN chown -R certctl:certctl /app
+
+# Switch to non-root user
+USER certctl
+
+# Expose port for server
+EXPOSE 8443
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+    CMD curl -f http://localhost:8443/health || exit 1
+
+# Default entrypoint is the server
+ENTRYPOINT ["/app/server"]
+
+# Notes:
+# - To run the server: docker run -p 8443:8443 -e DB_HOST=postgres certctl:latest
+# - To run the agent: docker run -e SERVER_URL=http://server:8443 -e API_KEY=<key> certctl:latest /app/agent