Prerender Alpine

Lightweight Prerender container built on Alpine Linux with Node and Headless Chrome.

• Prerender 5.12.0
• Chromium 86.0.4240.111
• Node 14.16.0

Requirements

• Docker

Usage

Pull and run the image:

docker pull dhlabs/prerender
docker run -p 3000:3000 dhlabs/prerender

Prerender will now be running on http://localhost:3000. Try the container out with curl:

curl http://localhost:3000/render?url=https://www.example.com/

Prerender plugins

A few default plugins have been activated by default (see server.js):

• https://github.com/prerender/prerender/blob/master/lib/plugins/whitelist.js
• https://github.com/prerender/prerender/blob/master/lib/plugins/httpHeaders.js
• https://github.com/prerender/prerender/blob/master/lib/plugins/removeScriptTags.js

This can be modified by creating your own server.js and mounting this file as a docker volume:

docker run -p 3000:3000 -v $(pwd)/server.js:/home/node/server.js dhlabs/prerender

Prerender memory cache

The prerender-memory-cache plugin is not activated by default. You can activate it with the environment variable MEMORY_CACHE=1.

You can customize cache behavior with environment variables :

• CACHE_MAXSIZE=1000 : max number of objects in cache
• CACHE_TTL=6000 : time to live in seconds
• PROXY_SERVER=string : passes --proxy-server flag to headless Chrome

docker run -p 3000:3000 -e MEMORY_CACHE=1 -e CACHE_MAXSIZE=1000 -e CACHE_TTL=6000 dhlabs/prerender

Prerender documentation

Check out the official Prerender documentation: https://github.com/prerender/prerender