Docker W3C/HTML5 validator instance

Dockerfile for the creation of a self contained W3C Markup validator (with HTML5 validation) instance for fast/offline validation of authored HTML documents.

Setup of such a configuration can be tricky and a little messy so having all this in an isolated and automated way seemed like a good idea.

Building

To build the Docker image, run the following:

$ ./build.sh

This will take some time - performing the following tasks:

• Install Ubuntu base (16.04 LTS), Apache HTTP server, OpenJDK 8, supervisord and a few others.
• Download latest W3C validator source and Validator.nu vnu.jar portable HTML5 validator jar.
• Configure Perl/CPAN.
• Install and configure W3C validator (including Validator.nu setup).
• Start Apache and Validator.nu under supervisord.

That's the boring/messy stuff out of the way - your new Docker image should now be built.

Alternatively you can pull this image directly from Docker Hub:

$ docker pull magnetikonline/html5-validator

Running

To start the image, run the following:

$ ./run.sh

This will start the image in a new backgrounded container, exposing the following ports:

• Port 80 (Apache2) presented to host on 8080.
• Port 8888 (Validator.nu Java server) presented to host on 8888.

Running the container on alternative local ports is controlled via docker run --publish arguments.

With this complete you should now be able to browse to http://localhost:8080/ and be presented with a working W3C validator instance.