Error: failed to spawn command: ./start.sh: Permission denied (os error 13)

@rubys doing what you recommended literally fixed the issues.

One interesting fact is that if I was dong RUN chmod +x ./start.sh it worked to up to the point to upgrade to V2.

Doing the below solved the timeout I was receiving during the upgrade

RUN chmod +x ./start.sh && \
    sed -i "s/\r$//g" ./start.sh