Add Docker, Kubernetes configurations, and CI workflows for deployment. Integrate Gin server for API, WebSocket support, and static file hosting. Refactor WebSocket gateway to use Gin router.

k8s/ingress.yaml

@@ -0,0 +1,25 @@
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: game-ingress
+  annotations:
+    cert-manager.io/cluster-issuer: letsencrypt-prod
+    traefik.ingress.kubernetes.io/router.entrypoints: web, websecure
+    traefik.ingress.kubernetes.io/router.middlewares: gitea-redirect-https@kubernetescrd
+spec:
+  ingressClassName: traefik
+  tls:
+    - hosts:
+        - ${APP_URL}
+      secretName: game-tls-secret
+  rules:
+    - host: ${APP_URL}
+      http:
+        paths:
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: escape-game
+                port:
+                  number: 80