# Stage 1: Build the Go application
FROM golang:1.23 AS builder

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

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

# Download all dependencies. Dependencies will be cached if the go.mod and go.sum files are not changed
RUN go mod download

# Copy the source code into the container
COPY . .

# Build the Go app
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -installsuffix cgo -o server .

# Stage 2: Create a small image with just the compiled binary
FROM alpine:latest

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

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

# Expose the port that the application will run on
EXPOSE 8080

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