One Django App for Multiple Different Customers

Hello, I have a django app deployed in DO. Currently I have 3 customers, so I created 3 different droplets. Its ok for now but I may have another 3-4 customers signing up in next few days and I expect it to grow 3-4 customers every month. I would really appreciate if someone could help me to figure out:

• Everytime when i have a new customer, Just take snapshot of one of the existing droplet and deploy that snapshot to new droplet and just change server_name in nginx file. Does it works? Currently everytime I have a customer i follow this https://www.digitalocean.com/community/tutorials/how-to-set-up-django-with-postgres-nginx-and-gunicorn-on-ubuntu-16-04 . There should be some easy way as it’s same app with same database structure (Postgress) just for different customer

• Most of my customers aren’t using all the resources. for example my each droplet has 1TB data transfer and max data transfer i am using in last 3 months is 2GB. I have 3 droplets and in a billing it says you have used 2GB of 3000GB data last month. I read that i can host multiple django in one droplets, should i consider this approach?

• I think any option I select from above, at the end i have to to git pull, restart server for each project. Is there any better alternatives that i can just to git pull, django migrate in a single place. (I am also looking at django-tenant)

I would really appreciate if anyone could direct me or let me know what should i look for or read for.

Thanks