content/nestjs upload file swagger

[marcjulian]

• preparing new swagger content
• content: openapi in nestjs
• add links
• content: upload file with swagger types
• content: add custom file filter

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit 651c2d3):

https://notiz-dev--pr158-content-nestjs-uploa-qogabl0t.web.app

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