Revert "Upgrade docker."
Revert "Upgrade docker."

This reverts commit 10ce1d6e02316ff0222d387819d3cb8cfb89c5d1.

trentindav/faucet,faucetsdn/faucet,Bairdo/faucet,gizmoguy/faucet,anarkiwi/faucet,Bairdo/faucet,wackerly/faucet,wackerly/faucet,byllyfish/faucet,trungdtbk/faucet,trungdtbk/faucet,shivarammysore/faucet,mwutzke/faucet,faucetsdn/faucet,mwutzke/faucet,gizmoguy/faucet,REANNZ/faucet,anarkiwi/faucet,shivarammysore/faucet,byllyfish/faucet,REANNZ/faucet,trentindav/faucet