WIP: initial fastapi endpoint implementation

Client endpoint - GET & POST implemented

backend/app/main.py

@@ -4,17 +4,22 @@
 NOTE:
 - 
 """
-from app.config import settings
+from app.core.config import settings
 from typing import Union
 from fastapi import FastAPI
+from app.api.clients.endpoints import router as clients_router
+
 
 app = FastAPI(
-    title=settings.PROJECT_NAME,
-    openapi_url=f"{settings.API_V1_STR}/openapi.json"
+    title=settings.project_name,
+    openapi_url=f"{settings.api_v1_str}/openapi.json"
 )
 
+
 @app.get("/")
 def read_root():
     """
     """
     return {"Hello": "World"}
+
+app.include_router(clients_router, tags=["clients"])