Better minify errors

[areille]

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Description

Closes #1152.

[areille]

@Keats do you want me to revert back the previous pr (#1146) in this one ?

[Keats]

It's already merged in released in 0.12, it just needs to be enabled + add back the docs

[Keats]

Thanks!

[areille]

@Keats should I open a new PR to re-enable minify-html ? I saw that it is forced set to false in config's mod.rs

[Keats]

Yes please! Hopefully the big issues are fixed now