Add GitHub Actions workflow to build grade-python images #5

Job	Run time
Determine base tag and full tag	2s
Build base image (linux/arm64)	51s
Build base image (linux/amd64)	42s
Merge base manifests	15s
Build comp image (linux/amd64)	37s
Build math image (linux/arm64)	1m 12s
Build xls image (linux/amd64)	24s
Build jupyter image (linux/amd64)	35s
Build y2 image (linux/arm64)	1m 12s
Build ply image (linux/amd64)	21s
Build jupyter image (linux/arm64)	49s
Build ml image (linux/amd64)	47s
Build rdf image (linux/arm64)	9s
Build xls image (linux/arm64)	34s
Build ml image (linux/arm64)	54s
Build ply image (linux/arm64)	38s
Build psql image (linux/arm64)	1m 1s
Build mec image (linux/arm64)	35s
Build psql image (linux/amd64)	43s
Build mec image (linux/amd64)	40s
Build comp image (linux/arm64)	10s
Build smt image (linux/arm64)	1m 9s
Build y2 image (linux/amd64)	52s
Build math image (linux/amd64)	58s
Build smt image (linux/amd64)	56s
Build rdf image (linux/amd64)	31s
Merge rdf manifests	0s
Merge xls manifests	13s
Merge comp manifests	0s
Merge mec manifests	14s
Merge ply manifests	13s
Merge jupyter manifests	12s
Merge ml manifests	12s
Merge psql manifests	14s
Merge smt manifests	0s
Merge y2 manifests	15s
Merge math manifests	24s
	19m 34s

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