Environmental variable naming convention proposal

[f8dca]

I think the environmental variable names for SQLPage are way to generic and prone for collision with other applications.

Maybe sqlpage_envname format would be a better choice.
Another benefit of this approach would be that when the variables listed they would be grouped together by default.

[lovasoa]

I'm agree with that for things that are specific to SQLPage. Would you want to make a pull request ? It should be easy to implement because we use a library for configuration that supports automatically adding prefixes.

However, at least for DATABASE_URL, I would be in favor of keeping it as is (or at least keeping it as an alternative to SQLPAGE_DATABASE_URL), since it's somewhat of a global generic convention in a lot of frameworks, and applications.

[lovasoa]

I just pushed v0.10.0 which implements that