Add options to keep exercise api cache pre-warmed

See wger-project/wger#1977

Author: rolandgeider

config/prod.env

@@ -69,9 +69,18 @@ SYNC_INGREDIENTS_CELERY=True
 # This option controls whether to download ingredients and their images from the
 # configured wger instance. When scanning products with the barcode scanner, it is
 # possible to dynamically fetch the ingredient if it is not known in the local database.
-# Possible values: WGER or None. Requires USE_CELERY to be set to true.
+# Possible values: WGER or None (to deactivate). Requires USE_CELERY to be set to true.
 DOWNLOAD_INGREDIENTS_FROM=WGER
 
+# Keep exercise api cache warmed up. This will setup a job that will run once
+# a day at a random time (this time is selected once when starting the server).
+# Requires USE_CELERY to be set to true.
+CACHE_API_EXERCISES_CELERY=True
+
+# Whether to force updating the exercise api cache every time the job runs
+CACHE_API_EXERCISES_CELERY_FORCE_UPDATE=False
+
+
 # Whether celery is configured and should be used. Can be left to true with
 # this setup but can be deactivated if you are using the app in some other way
 USE_CELERY=True