Dockerfile.api

# =============================================================================
# API-only Dockerfile — optimized for small EC2 instances (t3a.micro/small)
# =============================================================================

# Stage 1: Build C++ render binary (static link for alpine compatibility)
FROM alpine:3.19 AS cpp-builder

RUN apk add --no-cache build-base

WORKDIR /app
COPY src/render_api.cpp src/render_api.cpp

RUN g++ -std=c++17 -O3 -static -o fractal_api src/render_api.cpp

# Stage 2: Node.js runtime with C++ binary
FROM node:20-alpine

# Sharp needs these on alpine
RUN apk add --no-cache libstdc++

# Copy statically-linked C++ binary
COPY --from=cpp-builder /app/fractal_api /usr/local/bin/fractal_api

# Setup Node.js server
WORKDIR /app/server
COPY server/package.json server/package-lock.json ./
RUN npm ci --omit=dev && npm cache clean --force

COPY server/index.js .

ENV PORT=3000
ENV FRACTAL_BIN=/usr/local/bin/fractal_api
ENV NODE_ENV=production
ENV MAX_RENDERS=2

EXPOSE 3000

CMD ["node", "index.js"]