Adding 'TIER' setting constant to each type of deployment

This is for easy programmatic access to the tier name.

config/settings/container/dev.py

 # Settings for a test/dev GraceDB instance running in a container
 from .base import *
 
+TIER = "dev"
 CONFIG_NAME = "DEV"
 
 # Debug settings

config/settings/container/playground.py

@@ -3,6 +3,7 @@
 # and overrides or adds to them.
 from .base import *
 
+TIER = "playground"
 CONFIG_NAME = "USER TESTING"
 
 # Debug settings

config/settings/container/production.py

 # Settings for a production GraceDB instance running in a container
 from .base import *
 
+TIER = "production"
+
 DEBUG = False
 
 # Turn on alerts

config/settings/container/test.py

 # Settings for a test/dev GraceDB instance running in a container
 from .base import *
 
+TIER = "test"
 CONFIG_NAME = "TEST"
 
 # Debug settings

config/settings/vm/dev.py

@@ -4,6 +4,7 @@
 import socket
 from .base import *
 
+TIER = "dev"
 CONFIG_NAME = "DEV"
 
 # Debug settings

config/settings/vm/playground.py

@@ -3,6 +3,7 @@
 # from base.py settings) and overrides or adds to them.
 from .base import *
 
+TIER = "playground"
 CONFIG_NAME = "USER TESTING"
 
 # Debug settings

config/settings/vm/production.py

@@ -3,6 +3,7 @@
 # settings) and overrides or adds to them.
 from .base import *
 
+TIER = "production"
 DEBUG = False
 
 # LVAlert Overseer settings