Overview:

This PR does the following for users:

• allows users to create multiple maps for the same system/path as long as watch_content is False.
• ensure that the user is properly notified (along with task/WG-295: improve error message when duplicate syncing project hazmapper#255) that they can't create a map syncing the same folder.
• users are now synced every 30 minutes (file syncing still once an hour).

This PR also refactors the code by:

• Dropping the use of ObservableProject and adding a watch_users and watch_content to Project WG-185
• Improves nginx conf so we see the 409 error in local development.

Related to TACC-Cloud/hazmapper#255

Related Jira tickets:

• WG-295
• WG-179
• WG-185

Summary of Changes:

Testing Steps:

1. Test with task/WG-295: improve error message when duplicate syncing project hazmapper#255
2. Try creating multiple maps where Sync Folder is not checked. Having two maps in the same directory should now be allowed
3. Try creating two maps for the same folder and have Sync Folder checked. The creation of the second map should fail.

Notes:

TODO

• separate syncing users and syncing files
• add script to confirm that migration works and everything looks right.
• try locally with production and staging data to ensure migration is functioning.