Research: provide ManySats as tor onion service

[cstenglein]

• Research on how to provide a hidden service
• Add a note on the clearnet site on the onion address

[theborakompanioni]

There is also an Onion-Location header and/or <meta> tag than can be provided.

From https://community.torproject.org/onion-services/advanced/onion-location:

Onion-Location is an easy way to advertise an onion site to the users. You can either configure a web server to show an Onion-Location Header or add an HTML attribute in the website.

For the header to be valid the following conditions need to be fulfilled:

• The Onion-Location value must be a valid URL with http: or https: protocol and a .onion hostname.
• The webpage defining the Onion-Location header must be served over HTTPS.
• The webpage defining the Onion-Location header must not be an onion site.