ER: Create DR for why we make mac users build amd64 docker image

### Emergent Requirement - We need to document the decision to make mac users build amd64 docker images rather than native ones

### Issue you discovered this emergent requirement in

- #177 [this comment explains what's being done](https://github.com/hackforla/peopledepot/pull/275#issuecomment-2157092481)

### Date discovered 2024-06-09

### Did you have to do something temporarily

- [x] YES
- [ ] NO

### Who was involved

@freaky4wrld @fyliu

### What happens if this is not addressed

Mac users wouldn't know what went into the decision and why it's the better one. Future team might choose the more obvious option without considering the trade-offs.

### Resources

- [The problem and several solutions](https://pythonspeed.com/articles/docker-build-problems-mac/)
- [Explanation of how Rosetta 2 works compared to cpu emulation](https://stackoverflow.com/a/73625246)
- [Syntax for adding to docker-compose file](https://stackoverflow.com/a/68434363)
- See the original PR discussion for more details

### Recommended Action Items

- [ ] Create a new DR page to explain everything