improve formatting and capitalization

Author: Riskey

en/self-host/advanced-deployments/local-source-code.mdx

@@ -30,7 +30,9 @@ A series of middlewares for storage (e.g. PostgreSQL / Redis / Weaviate (if not
 
 ```Bash
 cd docker
+
 cp middleware.env.example middleware.env
+
 # change the profile to mysql if you are not using postgres
 # change the profile to other vector database if you are not using weaviate
 docker compose -f docker-compose.middleware.yaml --profile postgresql --profile weaviate -p dify up -d
@@ -191,7 +193,7 @@ To consume asynchronous tasks from the queue, such as dataset file import and da
     2025-04-28 17:07:15,742 INFO [pidbox.py:111]  pidbox: Connected to redis://:**@localhost:6379/1.
     ```
 
-### Start the Beat service
+### Start the Beat Service
 
 Additionally, if you want to debug the celery scheduled tasks or run the Schedule Trigger node, you can run the following command in another terminal to start the beat service: