feat: docker service improvements

[jsilva]

Describe your changes

• It adds support for using .dockerignore as an exclude filtering for tars created and sent to cloud build
  • addresses issue [Bug]: wanna using my idea directory, crashing on it #114
• Adds the cloud build link to stdout
  • addresses feature request [FeatureRequest]: Add url for cloud build when the build starts #71
• Better documents DockerService & refactors it a little

Issue ticket number and link

• [Bug]: wanna using my idea directory, crashing on it #114
• [FeatureRequest]: Add url for cloud build when the build starts #71

Checklist before requesting a review

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• If it is a core feature, I have verified thorough tests.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 50.00000% with 39 lines in your changes are missing coverage. Please review.

Project coverage is 74.49%. Comparing base (a85a84c) to head (8f70cbe).

Files	Patch %	Lines
src/wanna/core/services/docker.py	50.00%	28 Missing ⚠️
src/wanna/core/utils/io.py	35.29%	11 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #119      +/-   ##
==========================================
- Coverage   74.54%   74.49%   -0.06%     
==========================================
  Files          57       58       +1     
  Lines        2852     2866      +14     
==========================================
+ Hits         2126     2135       +9     
- Misses        726      731       +5     

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[racinmat]

LGTM