How to run multiple lambda scripts?

I have set up my lambda server based on the instructions mentioned in the below documentation.
https://dgraph.io/docs/graphql/lambda/server
I have developed 2 separate lambda scripts for 2 of my usecases.
I am able to run only one of the script at a time.

How can I run multiple lambda scripts with single docker command?

p.s I am not using Dgraph cloud instance