fix(Docker): #PRWLR-4781 fix docker environment issues and celery worker container connection (#37)

* build(Dockerfile): PRWLR-4781 remove versions from dockerfile deps

* fix(Docker): PRWLR-4781 fix celery worker container and apply dev fixtures by default

* build(docker-compose): PRWLR-4781 set default django settings to production in worker service

src/backend/config/settings/celery.py

@@ -1,7 +1,7 @@
 from config.env import env
 
-VALKEY_HOST = env("VALKEY_HOST", default="valkey-db")
-VALKEY_PORT = env("VALKEY_PORT", default="6479")
+VALKEY_HOST = env("VALKEY_HOST", default="valkey")
+VALKEY_PORT = env("VALKEY_PORT", default="6379")
 VALKEY_DB = env("VALKEY_DB", default="0")
 
 CELERY_BROKER_URL = f"redis://{VALKEY_HOST}:{VALKEY_PORT}/{VALKEY_DB}"