fix #4210 chore(nimbus): use separate sentry dsn for nimbus ui (#5080)

Because

* We'd like to track Nimbus UI as a separate Sentry project

This commit

* Adds a second Sentry DSN just for Nimbus UI

.env.sample

@@ -40,9 +40,10 @@ REDIS_HOST=redis
 REDIS_PORT=6379
 SECRET_KEY=SOMETHINGSECURE
 SENTRY_DSN=
+SENTRY_DSN_NIMBUS_UI=
 SKIP_REVIEW_ACCESS_CONTROL_FOR_DEV_USER=true
 STATSD_BACKEND=markus.backends.logging.LoggingMetrics
 STATSD_HOST=
 STATSD_PORT=
 STATSD_PREFIX=experimenter
-USE_GOOGLE_ANALYTICS=false
+USE_GOOGLE_ANALYTICS=false

app/experimenter/base/context_processors.py

@@ -18,7 +18,7 @@ def features(request):
         "APP_CONFIG": urllib.parse.quote(
             json.dumps(
                 {
-                    "sentry_dsn": settings.SENTRY_DSN,
+                    "sentry_dsn": settings.SENTRY_DSN_NIMBUS_UI,
                     "graphql_url": reverse("nimbus-api-graphql"),
                 }
             )

app/experimenter/settings.py

@@ -225,6 +225,7 @@ LOGGING = {
 
 # Sentry configuration
 SENTRY_DSN = config("SENTRY_DSN", default=None)
+SENTRY_DSN_NIMBUS_UI = config("SENTRY_DSN_NIMBUS_UI", default=None)
 if SENTRY_DSN:  # pragma: no cover
     RAVEN_CONFIG = {
         "dsn": SENTRY_DSN,