Add jitpack.yml to signal need for Java 21 (#275)

cstamas · web-flow · commit c4d432aa6b8d · 2026-01-27T21:09:13.000+01:00
For Maven wrapper, allegedly jitpack detects its presence
and is not needed to install anything, will go for `./mvnw`.
diff --git a/jitpack.yml b/jitpack.yml
@@ -0,0 +1,4 @@
+before_install:
+  - sdk install java 21-tem
+  - sdk use java 21-tem
+
