fix: fix typos in documentation and also change incorrect naming in functions and playbooks

[eelucio]

mostly harmless typos in docu.

I found a couple of typos in the ansible playbook variables:

    continer_name: "{{ db_name }}"

to

    container_name: "{{ db_name }}"

etc.

I do not know if this variables are standard ones or not in Ansible, but just in case I cahnged them everywhere

[antarcticrainforest]

Thanks for the effort @eelucio, but I hate to tell you that I am going to close this. Not because I don't like it. But the changes on the branch that I am working at, at the moment are simply too large. This would cause huge merge conflicts. I would suggest to wait until the refactoring is done.

I hope you don't mind.

[eelucio]

no probs, next time I will ask you before.