Merge pull request #2921 from nervosnetwork/testnet #299

Job	Run time
build / build	1m 41s
deploy-update (ckb-explorer-api) / deploy	5s
deploy-update (ckb-explorer-poolsyncer) / deploy	6s
deploy-update (ckb-explorer-scheduler) / deploy	3s
deploy-update (ckb-explorer-blocksyncer) / deploy	3s
deploy-update (ckb-explorer-worker) / deploy	3s
	2m 1s

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