Title: Configure syncthing to sync a single file
       Author: Solène
       Date: 28 January 2023
       Tags: linux syncthing nocloud
       Description: In this article, you will learn how to configure syncthing
       to synchronize a single file or extension in a directory
       
       # Introduction
       
       Quick blog entry to remember about something that wasn't as trivial as
       I thought.  I needed to use syncthing to keep a single file in sync
       (KeePassXC database) without synchronizing the whole directory.
       
       You have to use mask exclusion feature to make it possible.  Put it
       simple, you need the share to forbid every file, except the one you
       want to sync.
       
       This configuration happens in the `.stignore` file in the synchronized
       directory, but can also be managed from the Web interface.
       
 (HTM) Syncthing documentation about ignoring files
       
       # Example
       
       If I want to only sync KeePassXC files (they have the `.kdbx`
       extension), I have this in my `.stignore` file:
       
       ```text
       !*.kdbx
       *
       ```
       
       And that's all!
       
       Note that this must be set on all nodes using this share, otherwise you
       may have surprises.