Added platform parameter so it works regardless of the architecture o…

…f your laptop (#972)

docs/local_development.md

@@ -33,7 +33,7 @@ echo "$DOCKERHUB_PASSWORD" | docker login --username $DOCKERHUB_USERNAME --passw
 2. _create a container_ with an image from docker hub (notice we name it `mediaflux`)
 
 ```
-docker create --name mediaflux --mac-address 02:42:ac:11:00:02 --publish 8888:80 pulibraryrdss/mediaflux_dev:latest
+docker create --name mediaflux --platform linux/amd64 --mac-address 02:42:ac:11:00:02 --publish 8888:80 pulibraryrdss/mediaflux_dev:latest
 ```
 
 3. From now on when you need _start this container_ you can use: