# Build stage
FROM golang:1.25.5-alpine AS builder

WORKDIR /build

# Copy go mod files (for better caching)
COPY app/go.mod app/go.sum ./
RUN go mod download

# Copy source code
COPY app/ ./

# Build the application
RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o gateway .

# Runtime stage
FROM alpine:latest

RUN apk --no-cache add ca-certificates

WORKDIR /app

# Copy binary from builder
COPY --from=builder /build/gateway .

# Copy configuration
COPY gateway.yaml .

# Expose port
EXPOSE 8080

# Run the gateway
CMD ["./gateway"]