Thanks for the pull request, I'll come back to this after I push all the other PRs

@adrianvlupu Is it possible to review this at this time? Thank you!

I have done an update to this PR but not able to commit it.
Changes made:

• Added support to add an PUML diagram in the page in format ! [name] (name.puml) and it will be excluded from the normal rendering of the page. All other will be in top/bottom
• Merged from latest master and fixed the merge problems.
• Removed the extra config settings added in this PR, instead use current one (PLANTUML_SERVER_URL)
• Updated with latest PlantUML (plantuml-1.2022.1.jar)
• Updated some NPMs: md-to-pdf and joi
• Fixed "Download link" in deep folder structures (had problem on level 3 where it lost subfolders)
• Added "new line" on Download link/Go to link (before they came next to the diagram instead of under it)
• Added support for DITAA diagram type (only PNG is supported)

If someone could give me a hint on getting this into this PR or if I need to push it as a new PR

@MickeJohannesson Your changes look quite useful. But they seem like multiple PRs. Can you break it up and submit PRs separately?

The problem is that all changes (more or less) are made in the build.js file. And I have done them in the version from this PR.
Some are of course not needed (like PlantUML and NPM update).
But to make for example DITAA support work it can not be separated in the main version of the build.js in a simple way
What I instead could do is do a first commit on a new PR and then commit the "addons" as separate commits.

This seems like very handy feature and its pending for some time. If we could figure out conflicts and a path forward that would be awesome. Please let me know if there is anything i can do to help

Thanks for the implementation.

I couldn't merge it properly but the functionality is there from another PR (that included your changes) and my refactoring.

You can include diagrams using ![name](diagramName.puml) where diagramName is variable.