add JAVA_HOME env variable

Author: xiongemi

.nx/workflows/agents.yaml

@@ -5,6 +5,7 @@ launch-templates:
       DOCKER_HOST: ""
       SERVICES_HOST: ""
       LANG: C.UTF-8
+      JAVA_HOME: /usr/lib/jvm/java-17-openjdk-amd64
     resource-class: 'docker_linux_amd64/extra_large+'
     image: 'ubuntu22.04-node20.11-v10'
     init-steps:
@@ -19,6 +20,7 @@ launch-templates:
           sudo apt update
           sudo apt install -y openjdk-17-jdk
           sudo update-alternatives --set java /usr/lib/jvm/java-17-openjdk-amd64/bin/java
+          export JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64
           java -version
       - name: Setup gradle
         script: ./gradlew wrapper && ./gradlew --stop && ./gradlew clean