Add improvements to the http server

[danvergara]

Add quality of life changes

Description

This PR addresses some issues by adding some quality of life changes to morphos.

1. Add graceful shutdown to the http server
2. Add a healtz endpoint for health checks
3. Add a health check to the compose file
4. Rename the temporary path environment variable to MORPHOS_UPLOAD_PATH
5. Fixes the zip file preview by adding just an icon of a zip file
6. Add non-root user to the Dockerfile
7. Add a fix to shorten the modal title
8. Add an API to integrate morphos with other services, not only hypermedia

API:

GET /api/v1/formats

Response:

{"documents": ["docx", "xls"], "image": ["png", "jpeg"]}

POST /api/v1/upload/

Thi the endpoint converts files to a desired format. It is basically a multipart form data in a POST request. The API simply writes the converted files to the response body.

Usage:

curl -F 'targetFormat=epub' -F 'uploadFile=@/path/to/file/foo.pdf' localhost:8080/api/v1/upload --output foo.epub

Fixes #64
Fixes #59
Fixes #61
Fixes #50

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Chore
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

I QA'd every change done in this PR

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have checked my code and corrected any misspellings