Postgrest: db-uri param from file

[msalvadores]

jwt-secret can already be read from a file, it would be great to also enable this for the db-uri using the @/path/to/file notation.

This feature request was suggested as part of PR #1198

[steve-chavez]

Should be a simple change. If you're willing to give it a shot, the logic for loading the secret for jwt-secret is here, then you could add a bash test similar to the ones used for jwt-secret.

Or you could make a small donation and then I'll implement it myself :)

[msalvadores]

@steve-chavez Thanks for the pointers to give it a shot. It will take some time to get to it but I will see what I can do given that barely know any haskell.

[steve-chavez]

Already implemented in #1215 :).

[msalvadores]

Thanks!