doc: update readme with container engine setup instructions

Author: dottorblaster

README.md

@@ -18,6 +18,24 @@ sudo zypper in schedctl
 paru -S schedctl
 ```
 
+## Container engine setup
+
+### Podman
+
+In case you want to use Podman as your container engine of choice, you need to start the Podman socket to make sure `schedctl` can connect to it.
+
+```sh
+sudo systemctl start podman.socket
+```
+
+### containerd
+
+In case you want to use containerd as your container engine of choice, you just need to start the service.
+
+```sh
+sudo systemctl start containerd
+```
+
 ## Usage
 
 Starting and stopping a scheduler using schedctl is trivial. Just identify the scheduler you want to run using `schedctl list` and then operate it using `schedctl start` and `schedctl stop`.