Please cryptographically sign OsmAnd MapCreator releases (eg PGP)

[maltfield]

Description

Currently it is not possible to verify the authenticity or cryptographic integrity of OsmAnd MapCreator because the releases are not cryptographically signed.

• https://download.osmand.net/latest-night-build/OsmAndMapCreator-main.zip

This makes it hard for OsmAnd MapCreator users to safely obtain the MapCreator software, and it introduces them to watering hole attacks.

Steps to Reproduce

1. Go to the https://osmand.net/
2. Scroll down to footer and click Downloads link to https://osmand.net/docs/versions/free-versions
3. Click OsmAnd MapCreator link to https://osmand.net/docs/versions/map-creator
4. ???
5. Get confused and open ticket

Expected behavior: [What you expected to happen]

A few things are expected:

1. I should be able to download the OsmAnd PGP key out-of-band from popular third-party keyservers (eg https://keys.openpgp.org/)
2. I should be able to download a cryptographic signature of the release (or, better, the releases' digest file, such as a SHA256SUMS.asc file) along with the release itself
3. The downloads page itself should include a link to the documentation page that describes how to do the above two steps

Actual behavior: [What actually happened]

There's just literally no information on verifying downloads, and it appears that it is not possible to do so.