Refa: better service conf (#5471)

### What problem does this PR solve?

This patch fix most of the issues like #4853 #5038 and so on

the root reason is that we need to add the hostname to the `/etc/hosts`
which is not wrote in main README
and the code side read `conf/service_conf.yaml` as settings 
and its hard for developers to debug, this patch fix it, or maybe can
discuss better solution here
 
### Type of change

- [x] Refactoring

Signed-off-by: yihong0618 <zouzou0208@gmail.com>

conf/service_conf.yaml

   name: 'rag_flow'
   user: 'root'
   password: 'infini_rag_flow'
-  host: 'mysql'
+  host: 'localhost'
   port: 5455
   max_connections: 100
   stale_timeout: 30
 minio:
   user: 'rag_flow'
   password: 'infini_rag_flow'
-  host: 'minio:9000'
+  host: 'localhost:9000'
 es:
-  hosts: 'http://es01:1200'
+  hosts: 'http://localhost:1200'
   username: 'elastic'
   password: 'infini_rag_flow'
 infinity:
-  uri: 'infinity:23817'
+  uri: 'localhost:23817'
   db_name: 'default_db'
 redis:
   db: 1
   password: 'infini_rag_flow'
-  host: 'redis:6379'
+  host: 'localhost:6379'
 
 # postgres:
 #   name: 'rag_flow'