FROM node:20-alpine

WORKDIR /app

# Next.js standalone runtime. Required because the contact form's Server
# Action (sendEmail.ts, SMTP via nodemailer) needs a live Node process -
# it cannot run under static/nginx serving.
ENV NODE_ENV=production
ENV PORT=3000
ENV HOSTNAME=0.0.0.0

# Copy the standalone build artifact (server.js, .next/, public/)
COPY build /app

# The standalone build was created on macOS (darwin-arm64), so it bundles
# macOS-only native binaries for sharp (image optimisation). These crash
# on Linux/Alpine. Replace them with the correct musl-linux-x64 binaries.
RUN rm -rf node_modules/@img/sharp-darwin-arm64 \
           node_modules/@img/sharp-libvips-darwin-arm64 && \
    npm install --no-save --platform=linuxmusl --arch=x64 \
      @img/sharp-linuxmusl-x64@0.34.5 && \
    rm -rf /tmp/* /root/.npm

EXPOSE 3000

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