# Build stage
FROM golang:1.21-alpine AS builder

WORKDIR /app

# Install build dependencies
RUN apk add --no-cache git ca-certificates

# Copy go mod files
COPY go.mod go.sum ./

# Download dependencies
RUN go mod download

# Copy source code
COPY . .

# Build the application
RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o blogging-cms .

# Runtime stage
FROM alpine:latest

WORKDIR /app

# Install runtime dependencies
RUN apk add --no-cache ca-certificates tzdata

# Copy built application
COPY --from=builder /app/blogging-cms .

# Copy templates and static files
COPY templates ./templates
COPY static ./static

# Create non-root user
RUN addgroup -g 1000 appuser && \
    adduser -D -u 1000 -G appuser appuser && \
    chown -R appuser:appuser /app

USER appuser

EXPOSE 8080

HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
    CMD wget --quiet --tries=1 --spider http://localhost:8080/ || exit 1

CMD ["./blogging-cms"]