Add helm chart install

[ashleyschuett]

What does this PR do?

Adding Helm templates for launching Janus on Kubernetes.

[codecov[bot]]

Codecov Report

Merging #422 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #422   +/-   ##
=======================================
  Coverage   40.46%   40.46%           
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  Files          76       76           
  Lines        2659     2659           
=======================================
  Hits         1076     1076           
  Misses       1520     1520           
  Partials       63       63

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[aleksandrzhiliaev]

+1

[s4nji]

+1