Implement GET and /healthcheck

Change-Id: Ia2804306f91e5d877dd51af21ac02d94622a4089
Signed-off-by: Tommy Carpenter <tommy@research.att.com>
diff --git a/Dockerfile b/Dockerfile
index 0b49ac7..658963f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -21,7 +21,7 @@
 WORKDIR /tmp
 
 # copy NNG out of the  CI builder nng
-COPY --from=nexus3.o-ran-sc.org:10004/bldr-debian-python-nng:2-py3.7-nng1.1.1 /usr/local/lib/libnng.so /usr/local/lib/libnng.so
+COPY --from=nexus3.o-ran-sc.org:10004/bldr-debian-python:3-py3.7-nng1.1.1 /usr/local/lib/libnng.so /usr/local/lib/libnng.so
 
 # Installs RMr using debian package hosted at packagecloud.io
 RUN wget --content-disposition https://packagecloud.io/o-ran-sc/master/packages/debian/stretch/rmr_1.0.36_amd64.deb/download.deb