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proposal: Multiple docker images per Node.js version

See original GitHub issue

Thanks for the great tool! I am grateful for the wide range of development, not only tools but also ecosystems such as plugins and ready-to-run docker images!

By the way, the current docker image only works with Node.js version 12. Adding support for other versions would be more useful. Since HonKit recommends using the Node.js LTS version, the Docker Image should also match it.

But it’s also important to provide compatibility for older users, including those from GitBook. Therefore, by providing a combination of multiple OSs and versions as a tag, it is possible to provide a new environment while maintaining compatibility.

NOTE: Example of tagging in node images

Tag name	Description
18-bullseye	Specify both version and OS
18	Specify only the version (OS bullseye is selected as the recommended environment)
bullseye	Specify OS only (version 18, which is the latest version, is selected)

If we provide multiple Docker Images with similar rules, for example, the following tags will be prepared.

Tag name	Description
vX.Y.Z-nodeN	Specify both Honkit and Node.js versions
nodeN	Only Node.js version is specified and HonKit is the latest
vX.Y.Z	Specify only HonKit version and Node.js gets our recommended version
latest	Get the latest HonKit with our recommended Node.js version

Consideration

We need to consider what to choose as the recommended Node.js version.

If we choose 12, the Docker Image provided by the latest tag remains unchanged. This should be selected if compatibility is important.

However, this version is no longer recommended by HonKit. If we were to choose the latest LTS version of Node.js, it should be 16 by now.

Motivation

Even if we provide additional Docker Images, it doesn’t change much to use as is, but some users will get the following benefits.

Base image for using calibre that HonKit officially supports.
- Especially installing old versions of caliber is a pain.
- Plug-in users use honkit/honkit as a base image, and add their favorite fonts and plug-ins to it.
Above all, the performance improvement in 16 is wonderful.