librechat: add config file

hosts/rx4/services/librechat-oci.nix

@@ -17,6 +17,7 @@ in
   services.librechat-oci = {
     enable = true;
     inherit port;
+    configFile = ./librechat.yaml;
     externalUrl = "https://${fqdn}";
     environmentFile = config.sops.templates.librechat-env-file.path;
 

hosts/rx4/services/librechat.yaml

@@ -0,0 +1,27 @@
+version: 1.3.11
+cache: true
+
+interface:
+  modelSelect: true
+  parameters: true
+  presets: true
+  prompts:
+    use: true
+    create: true
+  bookmarks: true
+  multiConvo: true
+
+endpoints:
+  custom:
+    - name: 'OpenRouter'
+      apiKey: '${OPENROUTER_KEY}'
+      baseURL: 'https://openrouter.ai/api/v1'
+      headers:
+        x-librechat-body-parentmessageid: '{{LIBRECHAT_BODY_PARENTMESSAGEID}}'
+      models:
+        default: ['deepseek/deepseek-v4-flash']
+        fetch: true
+      titleConvo: true
+      titleModel: 'deepseek/deepseek-v4-flash'
+      dropParams: ['stop']
+      modelDisplayLabel: 'OpenRouter'