Check for node_modules and __pycache__ in path to ignore in FoundFiles

[chocoelho]

Description

I added some checkage for both node_modules and __pycache__ directories as both of them shouldn't be taken into consideration for FoundFiles. Also, a proposal of Dockerfile to easier the setup for contribution is present in this PR.

Related Issue

#328

Motivation and Context

node_modules can be really huge and is of no interest to prospector, the same can be said about __pycache__ directories. They can increase unnecessary running time and should be removed from consideration. Also, it'd be good to consider whether it's a proper time to take into consideration VCS ignore files.

How Has This Been Tested?

I've tested it in a clean container using Python 3.6 and tested for node_modules presence in found files, could also add tests for __pycache__, but since it's pretty similar to node_modules checkage, it'd only be redundant to add this as it'll only mean an increase in coverage percentage.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• My change requires a change to the dependencies
• I have updated the dependencies accordingly
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[coveralls]

Coverage increased (+0.06%) to 76.694% when pulling f38868e on vintasoftware:ft-ignore-node_modules-path into a8c5273 on PyCQA:develop.