Hey there,
first of all super cool that you have been working on an API for OPAC - I was actually looking for an API to programmatically access my uni library and find if they had certain books - this is exactly what I was looking for.
However, running this has proven to be a challenge, as following the instructions ./gradlew run yields a build failed error with Could not determine java version from '23.0.1'.. I am using jabba and set my version to 23.0.1, running this on an m2 max.
I've also put the folder you've linked opacapp-config-files in the same folder as this one, so I have .../opacapi/opacapp-config-files - did you mean that?
Thanks and looking forward to an answer from you,
Dan