build the docker error

[eerondamoon]

=> ERROR [3/4] RUN go get github.com/evilsocket/xray && cd /go/s 0.3s

[3/4] RUN go get github.com/evilsocket/xray && cd /go/src/github.com/evilsocket/xray/ && make:
#5 0.298 go: go.mod file not found in current directory or any parent directory.
#5 0.298 'go get' is no longer supported outside a module.
#5 0.298 To build and install a command, use 'go install' with a version,
#5 0.298 like 'go install example.com/cmd@latest'
#5 0.298 For more information, see https://golang.org/doc/go-get-install-deprecation
#5 0.298 or run 'go help get' or 'go help install'.

---

executor failed running [/bin/sh -c go get github.com/evilsocket/xray && cd $GOPATH/src/github.com/evilsocket/xray/ && make]: exit code: 1