Added the dashboard backend APIs

[fritzsima]

Goal of PR

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Implementation

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Manual Testing

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Automated Testing

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Submission Checklist

• [ ] Based on correct branch: feature submissions should be on develop, hotfixes should be on master

• [ ] The code passes our eslint definitions, unit tests, and contains correct TypeFlow annotations.

• [ ] Submission contains tests that cover any and all new functionality or code changes.

• [ ] Submission documents any new features or endpoints, and describes how developers would be expected to interact with them.

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[codecov[bot]]

Codecov Report

Merging #442 (72963a5) into master (0e2cf6f) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #442   +/-   ##
=======================================
  Coverage   82.75%   82.75%           
=======================================
  Files          22       22           
  Lines        2093     2093           
  Branches      380      380           
=======================================
  Hits         1732     1732           
+ Misses        357      329   -28     
- Partials        4       32   +28     

Impacted Files	Coverage Δ
hub/src/server/config.ts	94.77% <0.00%> (ø)
hub/src/server/drivers/AzDriver.ts	57.41% <0.00%> (ø)
hub/src/server/drivers/GcDriver.ts	59.37% <0.00%> (ø)
hub/src/server/drivers/S3Driver.ts	59.06% <0.00%> (ø)
hub/src/server/drivers/diskDriver.ts	94.30% <0.00%> (ø)

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