CI: Add custom Circle CI config
CI: Add custom Circle CI config

Signed-off-by: Andrea Luzzardi <442ffe3ffbfd024afcf0b7f8b108d05bca3aae43@gmail.com>

yongtang/swarmkit,aaronlehmann/swarmkit,fate-grand-order/swarmkit,AliyunContainerService/swarmkit,alyyousuf7/swarmkit,cheyang/swarmkit,sungwonh/swarmkit,vasil-yordanov/swarmkit,allencloud/swarmkit,jlhawn/swarmkit,docker/swarmkit,aaronlehmann/swarmkit,deljuven/swarmkit,runshenzhu/swarmkit,diogomonica/swarmkit,cezarsa/swarmkit,RenaudWasTaken/swarmkit,yongtang/swarmkit,runshenzhu/swarmkit,docker/swarmkit,dperny/swarmkit-1,alyyousuf7/swarmkit,allencloud/swarmkit,cezarsa/swarmkit,diogomonica/swarmkit,yp-engineering/swarmkit,AliyunContainerService/swarmkit,Noyan759/swarmkit,cheyang/swarmkit,jlhawn/swarmkit,Noyan759/swarmkit,sungwonh/swarmkit,elifa/swarmkit,fate-grand-order/swarmkit,yp-engineering/swarmkit,RenaudWasTaken/swarmkit,dperny/swarmkit-1,vasil-yordanov/swarmkit,deljuven/swarmkit,elifa/swarmkit