While most guides focuses on installing WriteFreely on Ubuntu or Docker (docker-compose), I could not find one that simply uses Synology with Docker.

And here’s how you do it:

1. Install Docker for your Synology.

2. Search and download algernon/writefreely.
   

3. Create a container with that image:

   1. Select bridge network
   2. Enable auto restart
   3. Set your desired port, leaving the container port as 8080
   4. Create a folder on your NAS and attach the folder here pointing to /data
   5. Declare these two variables: WRITEFREELY_ADMIN_USERNAME and WRITEFREELY_ADMIN_PASSWORD
   6. Start container

4. Buy me a drink on Ko-Fi :)

Now you can access WriteFreely from your browser pointing to your NAS IP Address and the port that you’ve indicated.