Error when build app

[Security-Champions-Beta]

error after run docker-compse up

[5/6] RUN go get -d -v ./...:
#9 5.134 get "golang.org/x/net/http2": found meta tag get.metaImport{Prefix:"golang.org/x/net", VCS:"git", RepoRoot:"https://go.googlesource.com/net"} at //golang.org/x/net/http2?go-get=1
#9 5.134 get "golang.org/x/net/http2": verifying non-authoritative meta tag
#9 5.708 golang.org/x/net (download)
#9 10.74 # cd .; git clone -- https://go.googlesource.com/net /go/src/golang.org/x/net
#9 10.74 Cloning into '/go/src/golang.org/x/net'...
#9 10.74 fatal: unable to access 'https://go.googlesource.com/net/': Could not resolve host: go.googlesource.com
#9 10.74 package golang.org/x/net/http2: exit status 128
#9 15.11 get "golang.org/x/net/http2/h2c": found meta tag get.metaImport{Prefix:"golang.org/x/net", VCS:"git", RepoRoot:"https://go.googlesource.com/net"} at //golang.org/x/net/http2/h2c?go-get=1
#9 15.11 get "golang.org/x/net/http2/h2c": verifying non-authoritative meta tag
#9 15.11 package golang.org/x/net/http2/h2c: cannot find package "golang.org/x/net/http2/h2c" in any of:
#9 15.11 /usr/local/go/src/golang.org/x/net/http2/h2c (from $GOROOT)
#9 15.11 /go/src/golang.org/x/net/http2/h2c (from $GOPATH)

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executor failed running [/bin/sh -c go get -d -v ./...]: exit code: 1
ERROR: Service 'backend' failed to build : Build failed