Overview of procedure

Create Droplet
Create Docker network
Configure firewall
Install and run Nginx Proxy Manager
Run Scribble.rs
Add Proxy Host in Nginx Proxy Manager
Create DNS record
Play!

Procedure

1. Create Droplet

Log into your Digital Ocean account.
Create a new Droplet.
- Choose an image: Marketplace > Docker 23.0.6 on Ubuntu 22.04
- Choose size: Shared CPU > Basic
- CPU options: Regular > $6/mo (1 GB RAM, 1 CPU, 25 GB SSD Disk, 1000 GB transfer)
- Choose authentication method: Password (you can choose SSH Key instead, but I'll be using Password in these notes)
SSH to the Droplet

2. Create Docker network

Issue the following command on the droplet:
```
docker network create nginxproxyman
```

3. Configure firewall

Issue the following commands on the Droplet:
```
ufw allow 80
ufw allow 443
ufw allow 81
```

4. Install and run Nginx Proxy Manager

Issue the following commands on the Droplet:

mkdir /opt/nginxproxymanager
cd /opt/nginxproxymanager

mkdir ./databases
touch ./databases/nginxproxy.db

touch ./docker-compose.yml

Populate the docker-compose.yml with the YAML content shown below (which I copy/pasted from this Vultr.com article).

nano ./docker-compose.yml

YAML content:

version: "3"
services:
   app:
     image: 'jc21/nginx-proxy-manager:latest'
     container_name: 'nginxproxymanager'
     restart: unless-stopped
     ports:
       - '80:80' 
       - '443:443' 
       - '81:81' 
     environment:
       DB_SQLITE_FILE: "/data/database.sqlite"

     volumes:
       - ./data:/data
       - ./letsencrypt:/etc/letsencrypt

 networks:
   default:
     external:
       name: nginxproxyman

Issue the following commands on the Droplet:
```
docker compose up -d
docker ps
```
In a web browser, visit the IP address of the droplet (on port 81; e.g. http://123.123.123.123:81). The Nginx Proxy Manager login page will appear.
Login using the username admin@example.com and password changeme.
When prompted, choose a new email address and password.
Leave the web page open for a later step (shown below).

5. Run Scribble.rs

Issue the following command on the Droplet:
```
docker run --network nginxproxyman --name scribblers -d biosmarcel/scribble.rs
```
The --network nginxproxyman tells Docker you want it to connect this new container to the Docker network you created earlier.

6. Add Proxy Host in Nginx Proxy Manager

In Nginx Proxy Manager, create a new Proxy Host.
- Domain names: (Enter a domain whose DNS records you can edit; e.g. example.com)
- Scheme: http
- Forward hostname: scribblers
- Forward port: 8080
- Enable "Cache assets", "Block exploits", and "Websocket support"
- SSL:
  - Request a new SSL certificate
  - Force SSL
  - Enable "HTTP/2", "HSTS", and "HSTS subdomains"

7. Create DNS record

Create the following A record on the DNS server associated with the domain name you entered above:
- Record type: A
- Host: (Enter some host at that domain; e.g. draw)
- Answer: (Enter the IP address of the Droplet)
- TTL: 660 (or any other amount you want)

8. Play!

Now that everything is set up, you can play Scribble.rs by visiting the host you specified above; e.g. https://draw.example.com.

References

Notes

My Digital Ocean referral link is: https://m.do.co/c/39488d73c82a
- You get $200 of Digital Ocean credit to use within 60 days
- When you reach $25 in billings, Digital Ocean gives me $25
- You can visit Digital Ocean without using the referral link, here: https://www.digitalocean.com/
Compatibility issues
- When set up this way, Scribble.rs seems to me to work in Safari on iOS, Brave on iOS, Firefox on Windows 10; but not Firefox Focus on iOS. Those are all the web browsers I have tested so far. I don't know whether the issues stem from this procedure or from Scribble.rs, itself.

gitname/README.md