Pon command not found (Sixfab_PPP installer using balenaOS)

End-of-Life Product GPRS/GPS Tracker HAT
1

I’m installing the Sixfab_PPP installer using a dockerfile and balenaos.

After installation, my hat tracker works, I am able to retrieve GPS data. However when I run pon I get: pon: command not found

Here is my dockerfile:

    FROM balenalib/raspberrypi4-64-python:3-stretch-run
    RUN apt-get update -y
    RUN apt-get upgrade
    RUN apt-get install -y gcc
    RUN apt-get install -y gcc-arm-linux-gnueabihf
    RUN apt-get install -y libc6-dev
    #RUN apt-get install -y python3-dev python3-smbus
    RUN apt-get install -y systemd
    RUN apt-get install -y psmisc
    RUN apt-get install -y wget
    RUN apt-get install -y git
    RUN apt-get install -y unzip
    RUN apt-get install -y build-essential
    RUN apt-get install -y libtool
    RUN apt-get install -y --force-yes expect
    #RUN apt-get install -y wiringpi
    SHELL ["/bin/bash", "-c"] #Tried adding this line but did not solve the problem
    RUN mkdir ebike
    WORKDIR "/ebike"
    RUN wget https://github.com/joan2937/pigpio/archive/master.zip
    RUN unzip master.zip
    WORKDIR "pigpio-master"
    RUN make
    RUN make install
    WORKDIR "../"
    RUN wget https://raw.githubusercontent.com/sixfab/Sixfab_PPP_Installer/master/ppp_installer/install.sh
    RUN chmod +x install.sh
    ADD  install_expect.sh ./
    RUN chmod +x install_expect.sh
    RUN ./install_expect.sh
    RUN git clone https://github.com/sixfab/Sixfab_RPi_Tracker_HAT.git
    WORKDIR "Sixfab_RPi_Tracker_HAT"
    RUN ls
    RUN python3 setup.py install
    WORKDIR "../"
    ADD  GNSS.py ./
    CMD pip install RPI.GPIO ; pon ;  echo $PATH;  pigpiod

Device: https://sixfab.com/product/raspberry-pi-gprs-gps-tracker-hat/