Cleaning/Updating k8petstore dev tooling and build fixing, moving webserver to

main.go.  Replacing vagrant tooling with docker-machine.

examples/k8petstore/web-server/Dockerfile

@@ -1,21 +1,20 @@
-FROM google/golang:latest
+FROM golang:latest
 
 # Add source to gopath.  This is defacto required for go apps.
-ADD ./src /gopath/src/
+ADD ./src /gopath/src/k8petstore
+RUN mkdir /gopath/bin/
 ADD ./static /tmp/static
 ADD ./test.sh /opt/test.sh
 RUN chmod 777 /opt/test.sh
-# $GOPATH/[src/a/b/c]
-# go build a/b/c
-# go run main
 
 # So that we can easily run and install
-WORKDIR /gopath/src/
+WORKDIR /gopath/src
 
 # Install the code (the executables are in the main dir)  This will get the deps also.
-RUN go get main
-#RUN go build main
+RUN export GOPATH=/gopath/ && go get k8petstore
+RUN export GOPATH=/gopath/ && go install k8petstore
+
 
 # Expected that you will override this in production kubernetes.
 ENV STATIC_FILES /tmp/static
-CMD /gopath/bin/main
+CMD /gopath/bin/k8petstore