As @chDVRuser said, you put in incorrect variables; this should be a port number.
On the GIT, it shows these options:
docker run -d --restart unless-stopped --network=host -e PLEX_PORT=[your_port_number_here] -e PLEX_CODE=local[,us_west,etc.] --name plex-for-channels ghcr.io/jgomez177/plex-for-channels
docker run -d --restart unless-stopped -p [your_port_number_here]:7777 --name plex-for-channels ghcr.io/jgomez177/plex-for-channels
Where it says [your_port_number_here]
, you need to put the number of the port you want to use (i.e., 7777, 8888, 3298, whatever, a number... and don't use the brackets, just the number).
I'm also assuming you are copying the run out of Docker Desktop, which will show all that other garbage. I meant like one of the two above; what you put in.