FROM golang:1.23-alpine AS builder

WORKDIR /app

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

# Download dependencies
RUN go mod download

# Copy the source code
COPY . .

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

# Use a small alpine image for the final stage
FROM alpine:latest

RUN apk --no-cache add ca-certificates

WORKDIR /app

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

# Expose the application port
EXPOSE 8080

# Set environment variables
ENV PORT=8080
ENV GIN_MODE=release

# Run the application
CMD ["./server"]