DAS-2214: Add the pre-commit file and update readme. (#86) #38

Job	Run time
build-images (harmony, Harmony.ipynb) / build-and-publish	1m 18s
build-images (geoloco, Geoloco_Regression.ipynb) / build-and-publish	1m 35s
build-images (hga, HGA_Regression.ipynb) / build-and-publish	1m 56s
build-images (harmony-regression, HarmonyRegression.ipynb) / build-and-publish	3m 2s
build-images (hoss, HOSS_Regression.ipynb) / build-and-publish	1m 20s
build-images (hybig, HyBIG_Regression.ipynb) / build-and-publish	1m 57s
build-images (n2z, N2Z_Regression.ipynb) / build-and-publish	1m 20s
build-images (regridder, Regridder_Regression.ipynb) / build-and-publish	1m 23s
build-images (swath-projector, SwathProjector_Regression.ipynb) / build-and-publish	1m 23s
build-images (trajectory-subsetter, TrajectorySubsetter_Regression.ipynb) / build-and-publish	1m 29s
build-images (variable-subsetter, VariableSubsetter_Regression.ipynb) / build-and-publish	1m 16s
	17m 59s

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