Prerender

Dockerfile

FROM zenika/alpine-chrome:124-with-node

# user chrome is created in the base image
# and has the following UID/GID: 1000:1000
USER chrome 
WORKDIR "/home/node"

COPY ./package.json .
COPY ./server.js .

# install npm packages and clear cache
RUN npm install --no-package-lock \
    && npm cache clean --force

EXPOSE 3000
EXPOSE 9222 

ENTRYPOINT ["tini", "--"]
CMD ["node", "server.js"]

package.json

{
    "name": "prerender-alpine",
    "version": "0.0.1",
    "description": "prerender server for prerendering web pages",
    "main": "server.js",
    "scripts": {
      "start": "node server.js"
    },
    "dependencies": {
      "prerender": "5.21.6",
      "prerender-memory-cache": "1.0.2"
    }
  }

server.js

'use strict';

const prerender = require('prerender');
const memoryCache = require('prerender-memory-cache');

const server = prerender({
    chromeFlags: ['--no-sandbox', '--headless', '--disable-gpu', '--remote-debugging-port=9222', '--remote-debugging-address=0.0.0.0', '--hide-scrollbars', '--disable-dev-shm-usage'],
    forwardHeaders: true,
    chromeLocation: '/usr/bin/chromium-browser'
});

const memCache = Number(process.env.MEMORY_CACHE) || 0;
if (memCache === 1) {
    server.use(memoryCache);
}

server.use({
    requestReceived: (req, res, next) => {
        if (req.prerender.url === '/' || req.prerender.url === '') {
            res.send(200, '<h1>Prerender</h1>');
        } else {
            next();
        }
    }
});

server.use(prerender.blacklist());
server.use(prerender.httpHeaders());
server.use(prerender.removeScriptTags());

server.start();