If no services are defined, podman-compose
crashes as services variable is None,
while the expected behavior might be
an error or the same as docker-compose, which will continue the
execution of the compose file (eg. creating networks, etc).
This commit fixes the crash and allows the program to continue, mimicking
docker-compose behavior.
- supports `ulimit: host` or other single value
- As well as `ulimit: [nofile=5000, nproc=5000]` array
- As well as `ulimit: {nofile: 5000, nproc: 5000}` dict
Authored-by: Tyler Ramer <tramer@pivotal.io>
