fix: Add explicit secrets definition to docker-compose.staging.yml

- Add secrets section at end of docker-compose.staging.yml
- Ensures secrets are properly loaded even if inherited from base file
- Should fix issue where REDIS_PASSWORD_FILE variable is not set
- Secrets are now explicitly defined: redis_password, db_user_password, app_key, vault_encryption_key, git_token

docker-compose.staging.yml

@@ -429,3 +429,23 @@ volumes:
   staging-redis-data:
     name: staging-redis-data
 
+# Docker Secrets Configuration
+# Secrets are inherited from docker-compose.base.yml
+# But we need to explicitly define them here to ensure they're available
+secrets:
+  db_user_password:
+    file: ./secrets/db_user_password.txt
+    external: false
+  redis_password:
+    file: ./secrets/redis_password.txt
+    external: false
+  app_key:
+    file: ./secrets/app_key.txt
+    external: false
+  vault_encryption_key:
+    file: ./secrets/vault_encryption_key.txt
+    external: false
+  git_token:
+    file: ./secrets/git_token.txt
+    external: false
+