Consider including SQLite in the image

[euclio]

Diesel supports sqlite as an option, so it'd be nice to include it.

[emk]

Ooh, that's a great idea! I'd happily accept a PR that:

• [ ] Adds SQLite dev packages to the Ubuntu part of the image.
• [ ] Adds a static version of SQLite installed in /usr/local/musl.
• [ ] Includes a test case in examples/using-diesel to make sure MySQL links correctly. It would need to be added to the Cargo.toml file and to main.rs.

Unfortunately, I won't be able to work on this myself any time soon, but I'd be happy to answer questions if anybody wants to try their hand at it. Mostly it's just a matter of messing around with compiler flags and being slightly frustrated.

But it would be a very welcome addition, and I would try to merge the PR as quickly as I can!