docs: add basic build instructions to README #589

Job	Run time
package (ubuntu-24.04)	3m 18s
End-to-end tests using single update command	6m 23s
Unit tests	48s
Run golint	58s
End-to-end tests using granular commands	7m 39s
package (ubuntu-24.04-arm)	4m 50s
Standalone integration tests	9m 18s
End-to-end tests using daemon	8m 59s
	42m 13s

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