Installation on local gives me 502 Bad Gateway

[solU]

I am trying to install the KoBo toolbox local for the first time. I follow the procedure for kobo-docker here up to docker-compose up and as i attached it looks fine
But I am getting 502 Bad Gateway when I try to access to Kobo via http://localhost:8000

All I have changed is 

HOST_ADDRESS=localhost on envfile.local.txt and

- 8006:9005 # Enketo Express on docker-compose.local.yml 

i am on Ubuntu 16.04

1.21.2  Compose

Is it a permission issue? everything including docker-compose logs -f requiers sudo level,  

Thank you 

[solU]

it was my problem. I haven't filled out all mandatory variables in the envfile

Now it is working