# Stage 1: Build the Go binary
FROM golang:1.22-alpine AS builder

# Set the Current Working Directory inside the container
WORKDIR /app

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

# Copy the source code into the container
COPY main.go .

# Build the Go app
# CGO_ENABLED=0 is needed for a static build
# GOOS=linux is to specify the target OS
# -a installs all packages to be rebuilt
# -installsuffix cgo is used with CGO_ENABLED=0
# -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, minimal image
FROM alpine:latest

WORKDIR /root/

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

# Expose port 8080 to the outside world
EXPOSE 8080

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