Systemd has a mechanism[0] for configuring those limits.

I believe you can limit a unit to 1 vCPU and 256MB of memory by using something like the following:

[Service]

CPUQuota=100% # 100% of a core

MemoryLimit=256MB

Red Hat has some documentation[1] as well if the systemd stuff is too oblique.

[0]: https://www.freedesktop.org/software/systemd/man/systemd.res...

[1]: https://access.redhat.com/documentation/en-us/red_hat_enterp...