Create gitignore file for imports and emulator key

[chasefleming]

Closes #1646

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For contributor use:

• Targeted PR against master branch
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• Code follows the standards mentioned here
• Updated relevant documentation
• Re-reviewed Files changed in the Github PR explorer
• Added appropriate labels

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 16 lines in your changes missing coverage. Please review.

Project coverage is 38.98%. Comparing base (ebbf96e) to head (f7f6fb5).

Files	Patch %	Lines
internal/super/setup.go	0.00%	16 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1651      +/-   ##
==========================================
- Coverage   39.16%   38.98%   -0.18%     
==========================================
  Files          52       52              
  Lines        3539     3555      +16     
==========================================
  Hits         1386     1386              
- Misses       1978     1994      +16     
  Partials      175      175              

Flag	Coverage Δ
unittests	38.98% <0.00%> (-0.18%)	⬇️

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