Multiple django projects with this approach - what about postgresql/redis/celery/etc

[markcerv]

Right now I develop locally with docker and push my django code up to Heroku. I tend to use a lot of containers for a single project.

docker-compose -f docker-compose.yml -f docker-compose.debug.yml up -d
[+] Running 8/8
 ✔ Network myproject_default            Created                                                                                      0.1s 
 ✔ Container myproject-db-1             Started                                                                                      2.3s 
 ✔ Container myproject-mailhog-1        Started                                                                                      2.6s 
 ✔ Container myproject-redis-1          Started                                                                                      2.3s 
 ✔ Container myproject-web-1            Started                                                                                      2.5s 
 ✔ Container myproject-celery-beat-1    Started                                                                                      2.5s 
 ✔ Container myproject-celery-1         Started                                                                                      2.6s 
 ✔ Container myproject-celery-flower-1  Started 

After reading Michael's book, I really want to try his approach. Do I create multiple db and redis containers (one for each project/site), or can they share resources so that I need to create fewer containers which might allow me to purchase a smaller server on Hetzner? How can this be accomplished?

And, thinking one step further, I'd also like to be able to run some PHP/MySQL containers/projects for some older projects and WordPress sites.

Thanks in advance!