# Build stage
FROM golang:1.21-alpine AS builder

WORKDIR /app

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

# Download dependencies
RUN go mod download

# Copy source code
COPY main.go .

# Build the binary
RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o middleware main.go

# Final stage
FROM alpine:latest

# Add ca-certificates for HTTPS requests
RUN apk --no-cache add ca-certificates tzdata

WORKDIR /root/

# Copy the binary from builder stage
COPY --from=builder /app/middleware .

# Expose port
EXPOSE 8080

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD wget --no-verbose --tries=1 --spider http://localhost:8080/health || exit 1

# Run the binary
CMD ["./middleware"]