Added the schema.SchemaService endpoint to the proxy to support
chameleon schema queries.

Change-Id: I9b3e1b6b6165d5fe6d3e38593a70ded90e707385
diff --git a/docker/Dockerfile.envoy b/docker/Dockerfile.envoy
index dcf8018..8007c26 100644
--- a/docker/Dockerfile.envoy
+++ b/docker/Dockerfile.envoy
@@ -3,6 +3,7 @@
 RUN apt-get update && apt-get -q install -y \
     curl
 ADD envoy/front-proxy /envoy/
+ADD pki /envoy/
 ADD envoy/go/envoyd/envoyd /usr/local/bin
 
 CMD /usr/local/bin/envoy -c /envoy/front-proxy/voltha-grpc-proxy.json