Add Servers/Containerization/Docker/Compose/EmulatorJS.md

Servers/Containerization/Docker/Compose/EmulatorJS.md

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+**Purpose**: Emulatorjs - In browser web based emulation portable to nearly any device for many retro consoles. A mix of emulators is used between Libretro and EmulatorJS.
+
+## Docker Configuration
+```yaml title="docker-compose.yml"
+---
+services:
+  emulatorjs:
+    image: lscr.io/linuxserver/emulatorjs:latest
+    container_name: emulatorjs
+    environment:
+      - PUID=1000
+      - PGID=1000
+      - TZ=America/Denver
+      - SUBFOLDER=/ #optional
+    volumes:
+      - /srv/containers/emulatorjs/config:/config
+      - /srv/containers/emulatorjs/data:/data
+    ports:
+      - 3000:3000
+      - 80:80
+      - 4001:4001 #optional
+    restart: unless-stopped
+    networks:
+        docker_network:
+          ipv4_address: 192.168.5.200
+
+networks:
+  docker_network:
+    external: true
+```
+
+```yaml title=".env"
+N/A
+```
+
+## Traefik Reverse Proxy Configuration
+If the container does not run on the same host as Traefik, you will need to manually add configuration to Traefik's dynamic config file, outlined below.
+```yaml
+http:
+  routers:
+    git:
+      entryPoints:
+        - websecure
+      tls:
+        certResolver: letsencrypt
+      http2:
+      service: emulatorjs
+      rule: Host(`emulatorjs.bunny-lab.io`)
+
+  services:
+    emulatorjs:
+      loadBalancer:
+        servers:
+          - url: http://192.168.5.200:80
+        passHostHeader: true
+```
+
+!!! note
+    Port 80 = Frontend
+    Port 3000 = Management Backend