feat(games): add whopixels hosting at whopxl.mana.how

Dockerfile, docker-compose service (port 5100), Caddy and cloudflared
routing for the WhoPixels game. PORT is now configurable via env var.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

cloudflared-config.yml

@@ -76,6 +76,12 @@ ingress:
   - hostname: mukke-api.mana.how
     service: http://localhost:3010
 
+  # Picture App
+  - hostname: picture.mana.how
+    service: http://localhost:5021
+  - hostname: picture-api.mana.how
+    service: http://localhost:3040
+
   # LLM Services
   - hostname: playground.mana.how
     service: http://localhost:5090
@@ -86,6 +92,10 @@ ingress:
   - hostname: tts-api.mana.how
     service: http://localhost:3022
 
+  # Games
+  - hostname: whopxl.mana.how
+    service: http://localhost:5100
+
   # Monitoring & Tools
   - hostname: grafana.mana.how
     service: http://localhost:8000