# Multi-stage build for Go + Node.js Backend
# Stage 1: Build Go binary
FROM golang:1.24-alpine AS builder
# Use latest stable go that works (docker tag might not have 1.25.6 yet, alpine is fine)
# Since the go.mod says 1.25.6, we'll let it use the toolchain if 1.24 is the base, or we just rely on standard go compilation.
RUN apk add --no-cache git make gcc musl-dev

WORKDIR /src
COPY protonvpn-wg-confgen/ ./
ENV GOTOOLCHAIN=auto
RUN go build -o /bin/protonvpn-wg-confgen cmd/protonvpn-wg/main.go

# Stage 2: Node.js Backend Production setup
FROM node:22-alpine
WORKDIR /app

# Install CA certs needed for Proton API calls
RUN apk add --no-cache ca-certificates tzdata

# Copy the compiled Go binary from Stage 1
COPY --from=builder /bin/protonvpn-wg-confgen /usr/local/bin/protonvpn-wg-confgen

# Setup the Node JS backend
COPY backend/package.json ./
RUN npm install
COPY backend/ ./
CMD ["npm", "run", "dev"]