rename networkdiag.py to app.py

Change-Id: I7c1ed5a21038334818bf5182b352dfb790168011
diff --git a/docker/Dockerfile b/docker/Dockerfile
index e59d267..b99bbae 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -6,6 +6,4 @@
 RUN pip3 install --upgrade pip
 RUN pip3 install -r requirements.txt
 EXPOSE 3333
-CMD [ "python3", "./networkdiag.py"]
-
-
+ENTRYPOINT [ "python3", "./app.py"]