diff --git a/doc/DISCLAIMER.md b/doc/DISCLAIMER.md
new file mode 100644
index 0000000..d5454c8
--- /dev/null
+++ b/doc/DISCLAIMER.md
@@ -0,0 +1,7 @@
+* Any known limitations, constrains or stuff not working, such as (but not limited to):
+    * HedgeDoc needs more than 3 GB of RAM to build.
+
+* Other infos that people should be aware of, such as:
+    * You can configure HedgeDoc by editing this file `/var/www/hedgedoc/config.json` using the [documentation](https://github.com/hedgedoc/hedgedoc/blob/master/docs/configuration.md)  
+	When you finished editing the configuration, for your changes to take effect, you will have to run: `sudo systemctl restart hedgedoc`.
+
diff --git a/doc/screenshots/screenshot.png b/doc/screenshots/screenshot.png
new file mode 100644
index 0000000..25104ad
Binary files /dev/null and b/doc/screenshots/screenshot.png differ
diff --git a/manifest.json b/manifest.json
index 6f7c41b..670c59d 100644
--- a/manifest.json
+++ b/manifest.json
@@ -8,6 +8,14 @@
     },
     "version": "1.8.2~ynh1",
     "url": "https://github.com/hedgedoc/hedgedoc",
+    "upstream": {
+        "license": "AGPL-3.0-only",
+        "website": "https://hedgedoc.org",
+        "demo": "https://demo.hedgedoc.org/",
+        "admindoc": "https://github.com/hedgedoc/hedgedoc/tree/master/docs",
+        "userdoc": "https://yunohost.org/fr/app_hedgedoc",
+        "code": "https://github.com/hedgedoc/hedgedoc"
+    },
     "license": "AGPL-3.0-only",
     "maintainer": {
         "name": "eric_G"