This includes:
- Building a Docker image for Postgres as well as SQLite
- Fuller instructions for usage of the package, including the Postgres builds.
A few related things changed here:
- `.env` is not used anymore -- the defaults in the Dockerfiles are
sufficient
- The Rust version in the Dockerfiles is increased to match the MSRV,
and with it the Alpine version bumped to one built with that Rust
version.
- Cargo dependencies on native-tls and openssl updated to include only
the `vendored` feature, so as not to require a system openssl
installation.
- Two GitHub jobs are set up, to build the two different Docker images
- The documentation incorrectly suggested using `DELETE .. CASCADE` to
delete clients. This syntax does not exist, as the cascading delete
is configured in the schema.
This is built to be more robust than the SQLite storage, and to
integrate with other applications. The idea is that for example a web
application might interact with the same DB to create and delete clients
as customers come and go.
