add https://github.com/unionj-cloud/go-doudou (#3729)
add https://github.com/unionj-cloud/go-doudou (#3729)

* add https://github.com/unionj-cloud/go-doudou

add go-doudou https://github.com/unionj-cloud/go-doudou

* Change order to comply with alphabetical order

Change order to comply with alphabetical order
jmelfi/awesome-go,avelino/awesome-go,pconcepcion/awesome-go,sadlil/awesome-go,theckman/awesome-go