Make Privacy Policy publicly accessible (#640)

PRIVACY_POLICY.md

@@ -0,0 +1,21 @@
+# Kiwix JS Privacy Policy
+
+## Short version
+
+Kiwix JS works offline, and does not collect or record any of your personal data. It only remembers
+your browsing history for the duration of a session (for the purpose of returning to previously
+viewed pages). This history is lost on exiting the app and is not recorded in any way.
+
+## Longer version
+
+This application only reads the archive files that you explicitly select on your device together
+with files in its own package. Some ZIM archives contain active content (scripts) which may, in
+rare circumstances, attempt to contact external servers for incidental files such as fonts.
+These scripts will only run if you enable Service Worker mode in Configuration. Nevertheless, if
+you believe your Internet access is insecure, or is being observed or censored, we recommend
+that you completely shut down your Internet (Data or WiFi) access before using the application.
+
+Additionally, if you obtained this app from a vendor Store (including extensions), then the Store
+operator may track your usage of the app (e.g. download, install, uninstall, date and number of
+sessions) for the purpose of providing anonymous, aggregate usage statistics to developers. If
+this concerns you, you should check the relevant Store Privacy Policy for further information.