# Stage 1: Build the Go application
FROM golang:1.25-alpine AS builder

WORKDIR /app

# Copy go.mod and go.sum files to download dependencies
COPY go.mod go.sum ./
RUN go mod download

# Copy the rest of the application source code
COPY . .

# Build the application
# CGO_ENABLED=0 is important for a clean static build for Alpine
# -o main specifies the output file name
RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o main .

# Stage 2: Create the final lightweight image
FROM alpine:latest

WORKDIR /root/

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

# Expose port 8080 (you can change this if your app uses a different port)
EXPOSE 8080

# Command to run the executable
CMD ["./main"]