# Use Go 1.25.6 or newer
FROM golang:1.25.6-alpine AS builder

# Enable Go modules
ENV GO111MODULE=on

# Set working directory
WORKDIR /app

# Install git (for go get) and build tools
RUN apk add --no-cache git

# Copy go.mod and go.sum first for better cache
COPY go.mod go.sum ./
RUN go mod download

# Copy the rest of the source code
COPY . .

# Build the Go app
RUN go build -o app .

# Stage 2: Create a minimal runtime image
FROM alpine:latest

# Set working directory
WORKDIR /root/

# Copy binary and .env file from builder
COPY --from=builder /app/app .
COPY .env .

# Expose the port (optional, for documentation)
EXPOSE 8080

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