Title: Front-End Proxy example services do not start due to /usr/local/bin/start_service.sh: not found

Description:

I am following the example here but when I get to the docker-compose ps validation step, both of the services report an exit code of 127. I then tried docker-compose logs which reports (amongst many other things):
service1_1 | /bin/sh: 1: /usr/local/bin/start_service.sh: not found
service2_1 | /bin/sh: 1: /usr/local/bin/start_service.sh: not found

Running off of master (46df72abb) and no changes from what I pulled down.

I did validate that if I try running CAT /usr/local/bin/start_service.sh it does show up as expected.

[optional Relevant Links:]

• Similar to this issue, but different root cause.
• I saw a SO answer regarding similar behavior, but I tried switching Dockerfile-service to use ubuntu, but no change in end behavior.