Merge pull request #48 from servian/Dockerfile-fix

Dockerfile fix - added `go mod tidy` to go-swagger to fetch all required dependencies.

Author: ttangsv

Dockerfile

@@ -7,6 +7,8 @@ RUN curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh
 ARG SWAGGER_UI_VERSION=3.20.9
 
 RUN go get -d -v github.com/go-swagger/go-swagger \
+    && cd $GOPATH/src/github.com/go-swagger/go-swagger \
+    && go mod tidy \
     && go install github.com/go-swagger/go-swagger/cmd/swagger \
     && curl -sfL https://github.com/swagger-api/swagger-ui/archive/v$SWAGGER_UI_VERSION.tar.gz | tar xz -C /tmp/ \
     && mv /tmp/swagger-ui-$SWAGGER_UI_VERSION /tmp/swagger \