super simple self-hosted excalidraw server with collaboration

Caddyfile

# make sure your dns is setup to forward your domain, in this case excalidraw.my-custom-domain.com to the server you're hosting this on

excalidraw.my-custom-domain.com {
  reverse_proxy http://excalidraw {
      header_up Host {http.request.host}
      header_up X-Real-IP {remote_host}
      header_up X-Forwarded-For {remote_host}
      header_up X-Forwarded-Proto {scheme}
  }
}

docker-compose.yaml

services:
  excalidraw:
    image: excalidraw/excalidraw:latest
    container_name: excalidraw
    environment:
      - EXCALIDRAW_PORT=80
      - COLLAB_SERVER_URL=http://collabserver:3001
    networks:
      - excalidraw-net
    volumes:
      - excalidraw-data:/app/public/room_data

  collabserver:
    image: excalidraw/excalidraw-room:latest
    container_name: excalidraw-collabserver
    environment:
      - PORT=3001
    networks:
      - excalidraw-net
 caddy:
    build: .
    image: caddy:2.7.6-alpine

    restart: unless-stopped
    volumes:
      - ./Caddyfile:/etc/caddy/Caddyfile
      - ./data:/data
      - ./certs:/etc/caddy/certs
    ports:
      - "80:80"
      - "443:443"

networks:
  excalidraw-net:

volumes:
  excalidraw-data: