Add DHBW Mannheim

src/main/java/org/fachschaften/keycloak/form_extensions/SignupFormAction.java

@@ -64,6 +64,7 @@ public class SignupFormAction implements FormAction, FormActionFactory {
         "@ruhr-uni-bochum.de",
         "@uni-mannheim.de",
         "@hs-mannheim.de",
+        "@dhbw-mannheim.de",
         // subdomains
         ".rwth-aachen.de",
         ".fsmpi.eu",
@@ -95,6 +96,7 @@ public class SignupFormAction implements FormAction, FormActionFactory {
         ".ruhr-uni-bochum.de",
         ".uni-mannheim.de",
         ".hs-mannheim.de",
+        ".dhbw-mannheim.de",
     };
 
     @Override