Hotfix: Docusaurus broken imports

[BorjaZarco]

Changes

• Add prebuild script that copies community files from root folder to static files
• Ignore files on static/gitignore
• Add docusaurus check GH action on pull request submitted
• Update file import. Now files are imported from static folder

[BorjaZarco]

After some more thorough investigation. Broken links were appearing because the CONTRIBUTING markdown on the root folder had a link to the CODE_OF_CONDUCT file.

Since the links are case-sensitive, this caused a broken link. Ultimately, I opted for a single community page that redirects to the original CODE OF CONDUCT and CONTRIBUTING guides on Git Hub. This may be a temporal solution while we find a sustainable way of having those files on Docusaurus too (without having to duplicate them and maintain 2 files)