docs: add `go install` instructions #729

Job	Run time
go_fmt	10s
eigenda	14m 56s
go_lint	35s
go_test	11m 23s
kurtosis_lint	27s
kurtosis_run	1m 20s
kurtosis_run_examples (kurtosis_start)	5m 26s
kurtosis_run_examples (kurtosis_incredible_squaring)	6m 45s
schema_checker	3s
kurtosis_run_examples (kurtosis_hello_world)	6m 1s
	47m 6s

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