legal: terms of service

[ahdinosaur]

examples:

• Mastodon: https://mastodon.social/terms
• Neocities: https://neocities.org/terms
• Loomio: https://loomio.gitbooks.io/manual/content/en/terms_of_service.html
• Digital Ocean: https://www.digitalocean.com/legal/terms/

[ahdinosaur]

• Hashbase: https://hashbase.io/terms
• ^ based on Heroku: https://www.heroku.com/policy/salesforce-heroku-msa

[ahdinosaur]

less relevant because #9, not sure we'll have a "service" anymore.