Fix Error `404 Not Found` for Static Files (#124)

After changing for FastAPI the server ignores STATIC_ROOT and STATIC_URL

etebase_fastapi/main.py

@@ -4,6 +4,7 @@ from django.conf import settings
 from fastapi import FastAPI, Request
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.middleware.trustedhost import TrustedHostMiddleware
+from fastapi.staticfiles import StaticFiles
 
 from django_etebase import app_settings
 
@@ -74,4 +75,6 @@ def create_application(prefix="", middlewares=[]):
     async def custom_exception_handler(request: Request, exc: CustomHttpException):
         return MsgpackResponse(status_code=exc.status_code, content=exc.as_dict)
 
+    app.mount(settings.STATIC_URL, StaticFiles(directory=settings.STATIC_ROOT), name="static")
+
     return app