CUB-112: scaffold Go backend with Chi, pgx, health check

backend/Dockerfile

@@ -1,37 +1,25 @@
-# ── Stage 1: Build ──────────────────────────────────────────
-FROM mcr.microsoft.com/dotnet/sdk:9.0 AS build
-WORKDIR /src
+# Build stage
+FROM golang:1.24-alpine AS builder
 
-# Copy csproj first for layer caching — restores before copying source
-COPY Extrudex.csproj .
-RUN dotnet restore
-
-# Copy the rest of the source
-COPY . .
-RUN dotnet publish Extrudex.csproj \
-    -c Release \
-    -o /app/publish \
-    --no-restore
-
-# ── Stage 2: Runtime ────────────────────────────────────────
-FROM mcr.microsoft.com/dotnet/aspnet:9.0 AS runtime
 WORKDIR /app
 
-# Install curl for health check (not included in aspnet base image)
-RUN apt-get update && apt-get install -y --no-install-recommends curl && rm -rf /var/lib/apt/lists/*
+# Copy go mod files first for caching
+COPY go.mod go.sum ./
+RUN go mod download
 
-# Non-root user for security
-RUN adduser --disabled-password --gecos "" appuser
-USER appuser
+# Copy source and build
+COPY . .
+RUN CGO_ENABLED=0 GOOS=linux go build -o server ./cmd/server
 
-# Copy published output from build stage
-COPY --from=build /app/publish .
+# Final stage
+FROM alpine:latest
+RUN apk --no-cache add ca-certificates
+
+WORKDIR /root/
+
+# Copy binary from builder
+COPY --from=builder /app/server .
 
-# ASP.NET Core listens on 8080 by default in .NET 8+
 EXPOSE 8080
 
-# Health check against /health endpoint
-HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
-    CMD curl --fail http://localhost:8080/health || exit 1
-
-ENTRYPOINT ["dotnet", "Extrudex.dll"]
+CMD ["./server"]