feat: remove app docker job for integration tests #282

Job	Run time
API test set: accounts.test.ts / Node: lts/*	11m 25s
API test set: addresses.test.ts / Node: lts/*	12m 40s
API test set: batches.test.ts / Node: lts/*	11m 18s
API test set: blocks.test.ts / Node: lts/*	11m 11s
API test set: contracts.test.ts / Node: lts/*	11m 15s
API test set: logs.test.ts / Node: lts/*	11m 14s
API test set: stats.test.ts / Node: lts/*	11m 51s
API test set: tokens.test.ts / Node: lts/*	11m 16s
API test set: transactions.test.ts / Node: lts/*	13m 14s
	1h 45m 24s

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