fix(export): use content type for YAML export

app/routes/export.py

@@ -1,4 +1,4 @@
-from fastapi import APIRouter
+from fastapi import APIRouter, Response
 from database import fetch_all
 import yaml
 import json
@@ -9,30 +9,26 @@ router = APIRouter()
 def fetch_k8s_data():
     config.load_incluster_config()
     v1 = client.CoreV1Api()
-    # Nodes
-    nodes = v1.list_node()
-    node_data = [{
+    nodes = [{
         "node_name": node.metadata.name,
         "cpu": node.status.capacity.get("cpu"),
         "memory": node.status.capacity.get("memory"),
-        "pods_allocatable": node.status.allocatable.get("pods")
-    } for node in nodes.items]
+        "pods_allocatable": node.status.allocatable.get("pods"),
+    } for node in v1.list_node().items]
 
-    # Namespaces
     namespaces = [ns.metadata.name for ns in v1.list_namespace().items]
-
-    return {"nodes": node_data, "namespaces": namespaces}
+    return {"nodes": nodes, "namespaces": namespaces}
 
 @router.get("/export")
 def export_data(format: str = "yaml"):
-    # Fetch database and Kubernetes data
     data = {
         "metal_nodes": fetch_all("metal_nodes"),
         "virtual_machines": fetch_all("virtual_machines"),
         "kubernetes": fetch_k8s_data(),
     }
 
-    # Return in the requested format
     if format.lower() == "yaml":
-        return yaml.safe_dump(data)
+        yaml_data = yaml.safe_dump(data, sort_keys=False)
+        return Response(content=yaml_data, media_type="text/yaml")
+    
     return json.dumps(data, indent=2)