bf: ZENKO-1736 update dockerfile

jessie/mongodb-org -> stretch/mongodb-org
to support the change to node:8-slim and necessary to build
dockerfile

Author: philipyoo

Dockerfile

@@ -7,7 +7,7 @@ ENV MONGO_VER 3.6.8
 COPY ./package.json .
 
 RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 2930ADAE8CAF5059EE73BB4B58712A2291FA4AD5 \
-    && echo "deb http://repo.mongodb.org/apt/debian jessie/mongodb-org/3.6 main" | tee /etc/apt/sources.list.d/mongodb-org.list \
+    && echo "deb http://repo.mongodb.org/apt/debian stretch/mongodb-org/3.6 main" | tee /etc/apt/sources.list.d/mongodb-org.list \
     && apt-get update \
     && apt-get install -y jq python git build-essential vim mongodb-org-shell=$MONGO_VER mongodb-org-tools=$MONGO_VER --no-install-recommends \
     && npm install
@@ -16,4 +16,3 @@ COPY ./ ./
 
 ENV NO_PROXY localhost,127.0.0.1
 ENV no_proxy localhost,127.0.0.1
-