move to config / redis / db

[todo]

aelf-block-api/app/core/baseService.js

Lines 19 to 24 in 10f7cc3

	// TODO: move to config / redis / db
	const rollbackCount = 60;
	const unConfirmedList = ['transactions', 'blocks', 'resources'];
	// demo: ['from transactions_0 '], ['from blocks_0 '], ['from resource_0 ']
	const matchUnconfirmedReg
	= new RegExp(`from\\s*(${unConfirmedList.join('|')})_\\d*\\s*`, 'g');

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This issue was generated by todo based on a TODO comment in 10f7cc3. It's been assigned to @hzz780 because they committed the code.