Add base docker service

[wtgee]

Added

• Docker musical chairs:

  • Add Dockerfile to be panoptes-utils but don't use for testing.
  • Generic panoptes-utils image (hosted on gcr.io) with panoptes-config-server as default command example
  • Move conda environment file into docker folder.

Changed

• Clean out the Contributing guide to point to POCS.
• Removing pillow<7 requirement.

Removed

• Removing unused new cli experiment.
• Removed all PANDIR and PANLOG references. Closes #263.

[codecov[bot]]

Codecov Report

Merging #264 (902093b) into develop (d7b4d12) will increase coverage by 0.48%. The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop     #264      +/-   ##
===========================================
+ Coverage    72.65%   73.13%   +0.48%     
===========================================
  Files           33       31       -2     
  Lines         2000     1969      -31     
===========================================
- Hits          1453     1440      -13     
+ Misses         547      529      -18     

Impacted Files	Coverage Δ
src/panoptes/utils/config/helpers.py	100.00% <100.00%> (ø)
src/panoptes/utils/database/file.py	98.61% <100.00%> (ø)
src/panoptes/utils/utils.py	96.20% <100.00%> (-0.05%)	:arrow_down:

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