fix Dockerfile for app engine sample (#231)

JustinBeckwith · jmdobry · commit ba151d535bea · 2016-10-10T15:30:09.000-07:00
diff --git a/appengine/extending-runtime/Dockerfile b/appengine/extending-runtime/Dockerfile
@@ -15,4 +15,4 @@ COPY . /app/
 RUN npm --unsafe-perm install
 
 # Run the app, default is "npm start"
-CMD npm start-on-prod
+CMD npm run start-on-prod
