`MathJax/extensions/a11y/mathmaps` contains .js files that are
not actually valid JavaScript, tripping up ESBuild.
This excludes them from the minification step
Signed-off-by: David Mehren <git@herrmehren.de>
Webpack now uses relative paths for resources linked from by static
snippets. A templated <base> tag has been introduced in headers
so app.js can set the base URL at runtime.
Signed-off-by: Enrico Guiraud <enrico.guiraud@cern.ch>