# Stage 1: Build the Go binary
FROM golang:1.21-alpine AS builder

WORKDIR /app

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

# Copy the rest of the source code
COPY . .

# Build the gateway service
WORKDIR /app/pkg/gateway
RUN CGO_ENABLED=0 GOOS=linux go build -v -o /app/server .

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

WORKDIR /app

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

# Copy the settings file
COPY ./pkg/gateway/settings.toml .

# Expose the port the gateway listens on
EXPOSE 8080

# Command to run the service
CMD ["/app/server"]