Dockerdev: Upgrade PostgreSQL from version 11 to 13

[oliverklee]

No description provided.

[Envek]

But why not 13? 😄

Also interesting question here is data migration: you can't just change RDBMS major version, you also need upgrade data. For example with pg_upgrade (which requires both old and new versions). Or not migrate but rather drop database volume and resetup the database. But it's offtopic for this particular example, of course: it is not meant to cover all possible cases.

[oliverklee]

Oh, I wasn't aware that version 13 already is available. :-)

I'll update the PR accordingly.

[oliverklee]

Done and repushed.

[Envek]

Thank you!

As a note: in your project you also need to bump docker image version to force its rebuild with newer client libraries.

Excerpt from our blog post:

You only need to upgrade the local image version every time you make changes to it (or to the arguments or files it relies on).