Fix container param typing

[cThrice]

SUMMARY

The container param was incorrectly set as a STR. Updated to correct type of DICT.
Additionally added some additional text to docs to assist in finding potential container options

ISSUE TYPE

• Bugfix Pull Request

COMPONENT NAME

ecs_taskdefinition

ADDITIONAL INFORMATION

- name: Deploy taskdef
  hosts: localhost
  tasks:
    - name: Create task definition
      run_once: true
      ecs_taskdefinition:
        force_create: true
        family: nginx
        state: present
        launch_type: FARGATE
        cpu: 2048
        memory: 4096
        network_mode: awsvpc
        containers:
          - name: nginx
            essential: true
            image: "nginx"

fatal: [localhost]: FAILED! => {
    "changed": false,
    "rc": 1
}

MSG:

MODULE FAILURE
See stdout/stderr for the exact error


MODULE_STDERR:

Traceback (most recent call last):
  File "<stdin>", line 102, in <module>
  File "<stdin>", line 94, in _ansiballz_main
  File "<stdin>", line 40, in invoke_module
  File "/Users/user/.pyenv/versions/3.7.3/lib/python3.7/runpy.py", line 205, in run_module
    return _run_module_code(code, init_globals, run_name, mod_spec)
  File "/Users/user/.pyenv/versions/3.7.3/lib/python3.7/runpy.py", line 96, in _run_module_code
    mod_name, mod_spec, pkg_name, script_name)
  File "/Users/user/.pyenv/versions/3.7.3/lib/python3.7/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/var/folders/ky/_q58mhx922v_6h35pl4p57bc0000gn/T/ansible_ecs_taskdefinition_payload_7kb3qm_a/ansible_ecs_taskdefinition_payload.zip/ansible_collections/community/aws/plugins/modules/ecs_taskdefinition.py", line 517, in <module>
  File "/var/folders/ky/_q58mhx922v_6h35pl4p57bc0000gn/T/ansible_ecs_taskdefinition_payload_7kb3qm_a/ansible_ecs_taskdefinition_payload.zip/ansible_collections/community/aws/plugins/modules/ecs_taskdefinition.py", line 353, in main
AttributeError: 'str' object has no attribute 'get'

After applying fix, error resolved and taskdef was corrected successfully

[tremble]

Hi, thanks for taking the time to submit this PR.

A couple of things:

• please could you add a changelog fragment: https://docs.ansible.com/ansible/latest/community/development_process.html#changelogs-how-to
• Given the huge number of potential options for containers, I think it's reasonable to refer to the boto3 docs for the potential options. However, I'd rather we gave folks a bit of a helping hand in finding them.

It looks like the reason this one slipped through is that the tests are currently disabled

[tremble]

Suggested change

	- A list of containers definitions. You can find the full list of options in the boto3 docs.
	- A list of containers definitions.
	- 'A full list of options can be found in the boto3 docs in the containerDefinitions argument to register_task_definition :
	U(https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/ecs.html#ECS.Client.register_task_definition)'

[Surgo]

Update docs in #238

[Surgo]

@cThrice Would it be okay to fix in #238?

[ansibullbot]

cc @Java1Guy @jillr @s-hertel @tremble @wimnat
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[goneri]

This issue should be fixed by #284. @cThrice can you check it works for you (main branch or 1.3.0 or greater)?