feat: cronjob sts && template readme #2508

Job	Run time
image-build (providers/license)	15m 58s
image-build (providers/cronjob)	16m 30s
image-build (providers/template)	17m 12s
image-build (providers/adminer)	13m 3s
image-build (providers/applaunchpad)	18m 14s
image-build (providers/terminal)	12m 29s
image-build (providers/dbprovider)	19m 37s
image-build (providers/costcenter)	16m 36s
image-build (providers/objectstorage)	19m 28s
image-build (providers/kubepanel)	19m 15s
image-build (providers/workorder)	15m 39s
image-build (providers/devbox)	22m 33s
image-build (desktop)	39s
save-sealos / save-sealos	17s
cluster-image-build	0s
	3h 27m 30s

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