feat: allow to customise max file size and mime types at bucket level

[fenos]

What kind of change does this PR introduce?

Feature

What is the new behavior?

• Allow creating buckets specifying a file size limit and white-listing mime-types which will serve for validating the file during upload

• Allow to update these values via the bucket update endpoint

• Validate max file size and mime type during upload

[coveralls]

Pull Request Test Coverage Report for Build 4125039381

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 155 of 171 (90.64%) changed or added relevant lines in 13 files are covered.
• 120 unchanged lines in 6 files lost coverage.
• Overall coverage decreased (-0.1%) to 85.663%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/storage/backend/s3.ts	13	14	92.86%
src/app.ts	4	6	66.67%
src/monitoring/logger.ts	0	2	0.0%
src/storage/storage.ts	37	42	88.1%
src/storage/renderer/image.ts	13	19	68.42%

Files with Coverage Reduction	New Missed Lines	%
src/monitoring/logger.ts	1	41.74%
src/config.ts	2	94.08%
src/app.ts	4	74.24%
src/storage/storage.ts	22	82.22%
src/storage/renderer/image.ts	38	75.37%
src/storage/backend/s3.ts	53	42.32%

Totals
Change from base Build 4023213000:	-0.1%
Covered Lines:	5004
Relevant Lines:	5809

---

💛 - Coveralls

[github-actions]

🎉 This PR is included in version 0.29.0 🎉

The release is available on GitHub release

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