Enable and start mongodb on rocketchat

i want to install rocket chat on amazon linux 2 i need mongodb i followed all the steps but when i enter this command sudo systemctl enable mongod && sudo systemctl start mongod here is the message that appears Failed to execute operation: No such file or directory when i lunch sudo systemctl status mongod i get

 [ec2-user@ip-172-31-20-12 ~]$ sudo systemctl status mongod

● mongod.service
   Loaded: not-found (Reason: No such file or directory)
   Active: failed (Result: exit-code) since Thu 2021-04-15 17:32:06 UTC; 2 weeks 3 days ago
 Main PID: 23759 (code=exited, status=0/SUCCESS)

Apr 15 17:32:06 ip-172-31-20-12.eu-west-3.compute.internal systemd[1]: Starting MongoDB Database Server...
Apr 15 17:32:06 ip-172-31-20-12.eu-west-3.compute.internal systemd[2190]: Failed at step EXEC spawning /usr/bin/mongod: No such file or directory
Apr 15 17:32:06 ip-172-31-20-12.eu-west-3.compute.internal systemd[1]: mongod.service: control process exited, code=exited status=203
Apr 15 17:32:06 ip-172-31-20-12.eu-west-3.compute.internal systemd[1]: Failed to start MongoDB Database Server.
Apr 15 17:32:06 ip-172-31-20-12.eu-west-3.compute.internal systemd[1]: Unit mongod.service entered failed state.
Apr 15 17:32:06 ip-172-31-20-12.eu-west-3.compute.internal systemd[1]: mongod.service failed. 

help me please

If the file /usr/bin/mongod does not exist then the most likely reason is that the package for mongo is not installed. Alternatively, the file might be elsewhere, like /usr/sbin/mongod, /bin/mongod or /sbin/mongod. Adjust the systemd configuration file accordingly.

I have the / usr / bin / mongod directory I think I know the problem I need the contents of the file /etc/systemd/system/mongodb.service