Add terms of service link and misc changes

[svienot]

Description:

• This PR brings several minor changes:
• A link to the SL terms of services added at the bottom of each ui page
• Change top left logo to a black version of HashScan logo
• Couple traces in h5ai-nginx module to help troubleshoot
• Update/clarify various .env files and README

Related issue(s):

Fixes #32

Notes for reviewer:

Deployed on Sourcify POC server