Changed the api port back to a static configuration

tox does not properly expose the port when dynamically allocated in the
circleci VM. If I manually ssh into the VM and I spin up the network it works
just fine. It's really the tox layer causing the issue. Tox does work for
statically allocated ports so I'm reverting back to that.

If I run tox locally with the dynamically allocated ports it works like a charm
so I don't know what's wrong. Maybe something with tox-pyenv?

Author: RmStorm

tests/pytest_docker_compose_tests/my_network/docker-compose.yml

@@ -4,7 +4,7 @@ services:
   my_api_service:
     build: ./a_buildable_container
     ports:
-      - "5000"
+      - "5000:5000"
     depends_on:
       - my_db
     restart: on-failure