made pa_job_manager use mythtv:mythtv, but had to hardcode PJM_* vars, I tried to pass them through docker-compose.yml

Dockerfile

@@ -1,5 +1,9 @@
 FROM ubuntu:20.04
 WORKDIR /code
+USER root
+ENV PJM_UID=500
+ENV PJM_GID=500
+RUN groupadd -g ${PJM_GID} mythtv && useradd -r -u ${PJM_UID} -g ${PJM_GID} mythtv
 ENV TZ=Australia/Melbourne
 RUN truncate -s0 /tmp/preseed.cfg && \
        (echo "tzdata tzdata/Areas select Australia" >> /tmp/preseed.cfg) && \

wrapper.sh

@@ -1,4 +1,4 @@
 #!/bin/bash
 
-python3 ./pa_job_manager.py &
+su - mythtv -g mythtv -c "python3 /code/pa_job_manager.py" &
 gunicorn --bind=0.0.0.0:443 --workers=2 --threads=2 --certfile /etc/letsencrypt/live/pa.depaoli.id.au/fullchain.pem --keyfile /etc/letsencrypt/live/pa.depaoli.id.au/privkey.pem main:app