### Description
This replaces the volume mount that shared PHP code between the nginx
and legacy containers with a custom nginx image that has the code baked
in from build. I would have preferred to find a solution that did not
require this, but it looks like docker volumes do not support temporary
volumes that only last the lifetime of the container.
**This is a new feature**:
No
**I have updated the documentation to reflect these changes**:
N/A
### Testing Notes
**What I did:**
Tested with docker-compose
**How you can replicate my testing:**
Run the docker-compose setup
### **Links**
Closes: #3150
---------
Co-authored-by: jo <ljonas@riseup.net>
658ce15185