move to using base image of python, not ubuntu, update requirements to use pip for as much as we can and not mix and match some apt get and pip3 for python dependencies

Dockerfile

@@ -1,25 +1,13 @@
-FROM ubuntu:22.04
+FROM python:latest
 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) && \
-       (echo "tzdata tzdata/Zones/Australia select Melbourne" >> /tmp/preseed.cfg) && \
-       debconf-set-selections /tmp/preseed.cfg && \
-       rm -f /etc/timezone /etc/localtime && \
-       apt-get update && \
-       DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true \
-       apt-get install -y tzdata
-RUN apt-get update && apt-get -y dist-upgrade && apt-get -y install python3-pip libpq-dev gunicorn mediainfo cmake libgl1-mesa-glx libglib2.0-0 python3-ldap libjpeg-turbo-progs ffmpeg git
-COPY requirements.txt requirements.txt
+RUN apt-get update && apt-get -y install libpq-dev mediainfo cmake libgl1-mesa-glx libglib2.0-0 libjpeg-turbo-progs ffmpeg git
+COPY . .
 RUN pip3 install -r requirements.txt
 RUN pip3 install --upgrade pillow --user
-EXPOSE 443
-EXPOSE 55432
-COPY . .
+EXPOSE 80
 RUN echo $RANDOM | md5sum | head -c 30 > /code/.sk
 RUN chmod 600 .sk
 RUN date > internal/build-date.txt
@@ -30,6 +18,4 @@ RUN rm -rf .git
 RUN chown mythtv:mythtv /code
 RUN chown mythtv:mythtv ./static
 RUN chown mythtv:mythtv ./static/*
-## cleanup of files from setup
-RUN rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 CMD ["./wrapper.sh"]

requirements.txt

@@ -1,4 +1,4 @@
-flask
+flask==2.3.3
 flask_login
 flask-ldap3-login
 sqlalchemy
@@ -19,3 +19,5 @@ Werkzeug
 flask-compress
 ffmpeg-python
 psycopg2
+python3-ldap
+gunicorn