# ==========================================
# Chat Switchboard - Backend Dockerfile
# ==========================================
# Standalone Go API server for cluster deployment.
# Build context is ./server (not repo root).
# ==========================================

# Build stage
FROM golang:1.22-bookworm AS builder

WORKDIR /app

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

# Copy source and tidy (resolves any go.sum gaps)
COPY . .
RUN go mod tidy
RUN CGO_ENABLED=0 go build -ldflags="-s -w" -o /bin/switchboard .

# Runtime stage
FROM debian:bookworm-slim

RUN apt-get update && apt-get install -y --no-install-recommends \
    ca-certificates \
    && rm -rf /var/lib/apt/lists/*

COPY --from=builder /bin/switchboard /usr/local/bin/switchboard

EXPOSE 8080

ENTRYPOINT ["switchboard"]