build: use initial checkout within container

speedup and simplify the build within the container

scripts/build/deploy.sh

@@ -5,8 +5,10 @@ mkdir -p dist
 echo "Circle branch: ${CIRCLE_BRANCH}"
 echo "Circle tag: ${CIRCLE_TAG}"
 docker run -i -t --name gfbuild \
-  -v $(pwd)/dist:/tmp/dist \
+  -v $(pwd):/go/src/github.com/grafana/grafana \
   -e "CIRCLE_BRANCH=${CIRCLE_BRANCH}" \
   -e "CIRCLE_TAG=${CIRCLE_TAG}" \
   -e "CIRCLE_BUILD_NUM=${CIRCLE_BUILD_NUM}" \
   grafana/buildcontainer
+
+sudo chown -R ${USER:=$(/usr/bin/id -run)}:$USER dist