Add full shop application: Go backend, PostgreSQL, Docker, Caddy and admin panel.

Dockerfile

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+# Build stage
+FROM golang:1.23-alpine AS builder
+
+WORKDIR /app
+
+RUN apk add --no-cache ca-certificates git
+
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY . .
+RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w" -o /shop ./cmd/shop
+
+# Runtime stage
+FROM alpine:3.21
+
+RUN apk add --no-cache ca-certificates tzdata
+
+WORKDIR /app
+
+COPY --from=builder /shop /app/shop
+
+EXPOSE 8080
+
+USER nobody
+
+ENTRYPOINT ["/app/shop"]