support python 3.12

- update start.sh, support installing extra apt package on startup if requirements-apt.txt exists.
- requirements-apt.txt is inspired from requirements.txt in python pip.
  the line starts with '#' will be ignored, so that we can add comment in requirements-apt.txt.
- requirements-apt.txt is rename-able by environment variable 'apt_requirements'.

Dockerfile

@@ -20,6 +20,7 @@ RUN mkdir -p /app;    echo "set mouse-=a" > /root/.vimrc;
 COPY ./start.sh /usr/local/bin/start.sh
 WORKDIR /app
 ENV py_requirements=./requirements.txt
+ENV apt_requirements=./requirements-apt.txt
 ENV app=main:app
 ENV opts=''
 CMD /usr/local/bin/start.sh

start.sh

@@ -1,5 +1,9 @@
 #!/bin/bash
 
+if [ -r "${apt_requirements}" ]; then
+   apt install -y `cat ${apt_requirements} | grep -v ^#`
+fi
+
 if [ -r "./setup.py" ] || [ -r "./setup.cfg" ] || [ -r "./pyproject.toml" ]; then
    pip3 install .
 elif [ -r "${py_requirements}" ]; then