Symfony prints a warning that it is recommended otherwise

Update to Symfony 5

See merge request dbp/middleware/dbp-api/api-server-template!13

chore(deps): update all non-major dependencies (patch)

See merge request dbp/middleware/dbp-api/api-server-template!12

chore(deps): update all non-major dependencies

See merge request dbp/middleware/dbp-api/api-server-template!11

The starter bundle gained an example configuration and this adds an example
config file to set it.

While we directed the docker image to translate the URLs to https anyway
this can be confusing since git behaves differently in docker vs outside.

Also in the meantime we have made all repos public, so there is no auth needed
for the repos and the extra work required using https no longer applies.

Otherwise this depends on the core bundle image and we don't want that image
to become public API.

We have switched to composer 2 everywhere and while 1.x should still work
we don't test with it. So install composer 2 in the docker image.

chore(deps): update all non-major dependencies

See merge request dbp/middleware/dbp-api/api-server-template!10

chore(deps): update all non-major dependencies

See merge request dbp/middleware/dbp-api/api-server-template!9

This disables security checks for the starter bundle endpoints

The main change is that the core bundle no longer contains tugraz
specifics, so we can remove the corresponding config.

This also pins api-platform/core since the new 2.6 release has various
breaking changes we haven't worked around yet.

chore(deps): update all non-major dependencies

See merge request dbp/middleware/dbp-api/api-server-template!8

chore(deps): update all non-major dependencies

See merge request dbp/middleware/dbp-api/api-server-template!7

chore(deps): update all non-major dependencies

See merge request dbp/middleware/dbp-api/api-server-template!5

Update all non-major dependencies

See merge request dbp/middleware/dbp-api/api-server-template!4

Update dependency vimeo/psalm to v4.4.0

See merge request dbp/middleware/dbp-api/api-server-template!3