diff --git a/src/app/upload/page.tsx b/src/app/upload/page.tsx
index 9045180..6e97a5a 100644
--- a/src/app/upload/page.tsx
+++ b/src/app/upload/page.tsx
@@ -17,6 +17,7 @@ export default function UploadPage() {
     kind: "frontend",
     visible: true,
     targetPort: "",
+    context: "",
   });
   const [loading, setLoading] = useState(false);
   const [result, setResult] = useState<{ ok: boolean; message: string } | null>(null);
@@ -49,6 +50,7 @@ export default function UploadPage() {
     if (form.port) payload.port = parseInt(form.port, 10);
     if (form.subdomain) payload.subdomain = form.subdomain.trim();
     if (form.targetPort) payload.targetPort = parseInt(form.targetPort, 10);
+    if (form.kind === "backend" && form.context.trim()) payload.context = form.context.trim();
 
     try {
       const res = await fetch("/api/modules", {
@@ -62,7 +64,7 @@ export default function UploadPage() {
           ok: true,
           message: `Módulo "${payload.name}" registrado. Deploy: ${data.webhook ? "webhook creado" : "sin webhook"}${data.deployLog ? " · " + data.deployLog.slice(0, 80) : ""}`,
         });
-        setForm({ name: "", repoUrl: "", branch: "main", port: "", subdomain: "", category: "otras-apps", kind: "frontend", visible: true, targetPort: "" });
+        setForm({ name: "", repoUrl: "", branch: "main", port: "", subdomain: "", category: "otras-apps", kind: "frontend", visible: true, targetPort: "", context: "" });
       } else {
         setResult({ ok: false, message: data.error || `Error HTTP ${res.status}` });
       }
@@ -199,6 +201,19 @@ export default function UploadPage() {
                         />
                         <div className="form-text">Puerto que expone el contenedor.</div>
                       </div>
+                      <div className="col-md-6">
+                        <label className="form-label fw-semibold">
+                          Subdirectorio <small className="text-muted">(backend monorepo)</small>
+                        </label>
+                        <input
+                          name="context"
+                          value={form.context}
+                          onChange={handleChange}
+                          placeholder="ej: backend-dotnet"
+                          className="form-control"
+                        />
+                        <div className="form-text">Carpeta con el Dockerfile (vacío = raíz).</div>
+                      </div>
               </div>
             </details>