How to Deploy a Node.js Application on Springwinter

import express from "express";

const app = express();
app.get("/healthz", (_request, response) => response.sendStatus(200));

const server = app.listen(process.env.PORT || 3000, "0.0.0.0");

function shutdown() {
  server.close(() => process.exit(0));
  setTimeout(() => process.exit(1), 8000).unref();
}

process.on("SIGTERM", shutdown);
process.on("SIGINT", shutdown);

FROM node:24-bookworm-slim AS build
WORKDIR /app
COPY package*.json ./
RUN npm ci
COPY . .
RUN npm run build && npm prune --omit=dev

FROM node:24-bookworm-slim
ENV NODE_ENV=production
WORKDIR /app
COPY --from=build --chown=node:node /app ./
USER node
EXPOSE 3000
CMD ["node", "dist/server.js"]