fix: Github Actions

Author: julian-siebert

build.gradle.kts

@@ -1,5 +1,8 @@
+import net.thebugmc.gradle.sonatypepublisher.PublishingType
+
 plugins {
     id("studio.o7.remora") version "0.0.9"
+    id("net.thebugmc.gradle.sonatype-central-portal-publisher") version "1.2.4"
 }
 
 remora {
@@ -8,8 +11,6 @@ remora {
 
     description = "Agones Java gRPC SDK implementation"
 
-    mavenCentral.isEnabled = true
-
     framework {
         lombok.isEnabled = true
     }
@@ -21,3 +22,15 @@ dependencies {
 }
 
 java.toolchain.languageVersion.set(JavaLanguageVersion.of(21))
+
+centralPortal {
+    username = System.getenv("SONATYPE_USERNAME")
+    password = System.getenv("SONATYPE_PASSWORD")
+    name = remora.artifactId
+    publishingType = PublishingType.USER_MANAGED
+}
+
+signing {
+    useInMemoryPgpKeys(System.getenv("GPG_KEY"), System.getenv("GPG_PASSPHRASE"))
+    sign(publishing.publications)
+}