Add Privacy Policy page

[jgarciao]

We should add a Privacy policy page informing about the information collected and how to enable tracking protection

Examples:

• https://www.ubuntu.com/legal/terms-and-policies/privacy-policy
• http://www.omgubuntu.co.uk/privacy-policy
• https://www.fsf.org/about/free-software-foundation-privacy-policy
• https://lwn.net/op/Privacy.lwn

[SISheogorath]

Just jumping once more onto this issue in order to highly the urgency of the missing privacy policy. It's required as FlatHub is definitely intended to be used by European users and therefore GDPR applies.

Also, it should be mention that by not having a privacy policy the page can't use Google Analytics according to their terms: https://www.google.com/analytics/terms/us.html (See point 7)

Finally it's just a nice gesture to have such a page to inform people about what FlatHub is doing with users data like IP addresses, collected statistics, …

[okias]

I'd like to remind, that until #162 is solved, Flathub page is likely against law inside EU, since it does not inform user about being tracked.

Another solution is prohibit users from EU access to this website, to prevent law violation. But I believe that implementing #162 or just stating Privacy Policy is much more suitable solution.