Add list configs and environments (#12438)

### What problem does this PR solve?

1. list configs;
3. list envs;

```
admin> list configs;
+-------------------------------------------------------------------------------------------+-----------+----+---------------+-------+----------------+
| extra                                                                                     | host      | id | name          | port  | service_type   |
+-------------------------------------------------------------------------------------------+-----------+----+---------------+-------+----------------+
| {}                                                                                        | 0.0.0.0   | 0  | ragflow_0     | 9380  | ragflow_server |
| {'meta_type': 'mysql', 'password': 'infini_rag_flow', 'username': 'root'}                 | localhost | 1  | mysql         | 5455  | meta_data      |
| {'password': 'infini_rag_flow', 'store_type': 'minio', 'user': 'rag_flow'}                | localhost | 2  | minio         | 9000  | file_store     |
| {'password': 'infini_rag_flow', 'retrieval_type': 'elasticsearch', 'username': 'elastic'} | localhost | 3  | elasticsearch | 1200  | retrieval      |
| {'db_name': 'default_db', 'retrieval_type': 'infinity'}                                   | localhost | 4  | infinity      | 23817 | retrieval      |
| {'database': 1, 'mq_type': 'redis', 'password': 'infini_rag_flow'}                        | localhost | 5  | redis         | 6379  | message_queue  |
| {'message_queue_type': 'redis'}                                                           |           | 6  | task_executor | 0     | task_executor  |
+-------------------------------------------------------------------------------------------+-----------+----+---------------+-------+----------------+
admin> list envs;
+-------------------------+------------------+
| env                     | value            |
+-------------------------+------------------+
| DOC_ENGINE              | elasticsearch    |
| DEFAULT_SUPERUSER_EMAIL | admin@ragflow.io |
| DB_TYPE                 | mysql            |
| DEVICE                  | cpu              |
| STORAGE_IMPL            | MINIO            |
+-------------------------+------------------+
admin> 
```

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

admin/server/routes.py

@@ -21,7 +21,7 @@ from flask_login import current_user, login_required, logout_user
 
 from auth import login_verify, login_admin, check_admin_auth
 from responses import success_response, error_response
-from services import UserMgr, ServiceMgr, UserServiceMgr, SettingsMgr
+from services import UserMgr, ServiceMgr, UserServiceMgr, SettingsMgr, ConfigMgr, EnvironmentsMgr
 from roles import RoleMgr
 from api.common.exceptions import AdminException
 from common.versions import get_ragflow_version
@@ -449,6 +449,30 @@ def get_variable():
     except Exception as e:
         return error_response(str(e), 500)
 
+@admin_bp.route('/configs', methods=['GET'])
+@login_required
+@check_admin_auth
+def get_config():
+    try:
+        res = list(ConfigMgr.get_all())
+        return success_response(res)
+    except AdminException as e:
+        return error_response(str(e), 400)
+    except Exception as e:
+        return error_response(str(e), 500)
+
+@admin_bp.route('/environments', methods=['GET'])
+@login_required
+@check_admin_auth
+def get_environments():
+    try:
+        res = list(EnvironmentsMgr.get_all())
+        return success_response(res)
+    except AdminException as e:
+        return error_response(str(e), 400)
+    except Exception as e:
+        return error_response(str(e), 500)
+
 @admin_bp.route('/version', methods=['GET'])
 @login_required
 @check_admin_auth

admin/server/services.py

@@ -306,5 +306,37 @@ class SettingsMgr:
         elif len(settings) > 1:
             raise AdminException(f"Can't update more than 1 setting: {name}")
         else:
-            raise AdminException(f"No sett"
-                                 f"ing: {name}")
+            raise AdminException(f"No setting: {name}")
+
+class ConfigMgr:
+
+    @staticmethod
+    def get_all():
+        result = []
+        configs = SERVICE_CONFIGS.configs
+        for config in configs:
+            config_dict = config.to_dict()
+            result.append(config_dict)
+        return result
+
+class EnvironmentsMgr:
+    @staticmethod
+    def get_all():
+        result = []
+
+        env_kv = {"env": "DOC_ENGINE", "value": os.getenv('DOC_ENGINE')}
+        result.append(env_kv)
+
+        env_kv = {"env": "DEFAULT_SUPERUSER_EMAIL", "value": os.getenv("DEFAULT_SUPERUSER_EMAIL", "admin@ragflow.io")}
+        result.append(env_kv)
+
+        env_kv = {"env": "DB_TYPE", "value": os.getenv("DB_TYPE", "mysql")}
+        result.append(env_kv)
+
+        env_kv = {"env": "DEVICE", "value": os.getenv("DEVICE", "cpu")}
+        result.append(env_kv)
+
+        env_kv = {"env": "STORAGE_IMPL", "value": os.getenv("STORAGE_IMPL", "MINIO")}
+        result.append(env_kv)
+
+        return result