fix build without giteaToken defined

build.gradle

@@ -36,6 +36,7 @@ tasks.named('test') {
     useJUnitPlatform()
 }
 
+if (project.hasProperty('giteaToken') && project.giteaToken) {
     publishing {
         publications {
             mavenJava(MavenPublication) {
@@ -58,6 +59,9 @@ publishing {
             }
         }
     }
+} else {
+    println "No giteaToken defined - skipping publishing configuration"
+}
 
 gradle.taskGraph.whenReady { taskGraph ->
     def banner = """