feat: add initial docker-compose configuration for convertx service

Co-authored-by: Copilot <copilot@github.com>

nodes/heimdall/convertx/compose.yaml

@@ -0,0 +1,26 @@
+# docker-compose.yml
+services:
+  convertx:
+    image: ghcr.io/c4illin/convertx
+    container_name: convertx
+    networks:
+      - proxy-net
+    restart: unless-stopped
+    # ports:
+    #   - "3000:3000"
+    environment:
+      - JWT_SECRET=aLongAndSecretStringUsedToSignTheJSONWebToken1234 # will use randomUUID() if unset
+      # - HTTP_ALLOWED=true # uncomment this if accessing it over a non-https connection
+    volumes:
+      - /mnt/appdata/convertx/data:/app/data
+    labels:
+      - "traefik.enable=true"
+      - "traefik.http.routers.convertx.entrypoints=websecure"
+      - "traefik.http.routers.convertx.rule=Host(`convertx.castaldifamily.com`)"
+      - "traefik.http.routers.convertx.tls=true"
+      - "traefik.http.routers.convertx.tls.certresolver=cloudflare"
+      - "traefik.http.services.convertx.loadbalancer.server.port=3000"
+
+networks:
+  proxy-net:
+    external: true