Gitlab CI/CD php applications in docker. How to organize?

Question

Python

I want to organize the assembly, testing and delivery of the application.
What is:
- docker-compose.yml with 3 services (nginx, php-fpm, mysql)
- .gitlab-ci.yml with 2 (so far) stages and 3 jobs (build + test (unit tests) .cs validation))
Questions:
1. How to properly fumble containers (which were collected in the first step) between jobs? Push at the build stage to the registry, then at each step do pull or docker save and into artifacts?
2. How to properly assemble and deliver the application for production? Where to make a build?
ps if there are materials on my questions, it will be great if you let me read it :)

Answer 1

def pr(self):
    try:
      print(self.last_name)
    except AttributeError:
      print('var has been deleted')

Answer 2

def pr(self):
    if hasatrr(self, 'last_name'):
        print(self.last_name)
    else:
        print('var has been deleted')

Or maybe in one line

def pr(self):
    print(getattr(self, 'last_name', 'var has been deleted'))

Answer 3

Isn't that better?

def pr(self) -> bool:
    return 'last_name' in self.__dir__()

Answer 4

2. The build has already been made during the build in the first step. And was poured into test environments after successful testing and tested by meat people.
You don't need to build anything during deployment.
The CD in the gitlab is weak, I would recommend this approach: the deployment script (and manifests) in a separate project, it will be responsible for placing previously built images on the necessary machines (test or production).
The machine, project and other parameters can be specified before starting.
Convenient to do with https://docs.gitlab.com/ce/ci/chatops/

Answer 5

it is better to fumble containers through the repository, because due to the caching of layers, a very fast and efficient scheme of work is obtained.