feat: add debug endpoint

Author: alukach

src/stac_auth_proxy/app.py

@@ -63,6 +63,13 @@ def create_app(settings: Optional[Settings] = None) -> FastAPI:
             methods=methods,
         )
 
+    if settings.debug:
+        app.add_api_route(
+            "/_debug",
+            lambda: {"settings": settings},
+            methods=["GET"],
+        )
+
     # Catchall for remainder of the endpoints
     app.add_api_route(
         "/{path:path}",

src/stac_auth_proxy/config.py

@@ -28,6 +28,8 @@ def __call__(self, token_dependency):
 class Settings(BaseSettings):
     """Configuration settings for the STAC Auth Proxy."""
 
+    debug: bool = False
+
     upstream_url: HttpUrl = HttpUrl(url="https://earth-search.aws.element84.com/v1")
     oidc_discovery_url: HttpUrl