To Run the Backend on the VM:

1. cd to the ocd_backend folder
2. Run command: ps aux | grep ocd_backend.jar to find the pid of the alreading running process
3. run: kill -9 pid
4. run: mvn clean install
5. then run: nohup java -jar -Dserver.port=8081 target/ocd_backend.jar > output.log 2>&1 &