Initial commit: 2048 game with Knative and Kourier deployment

- Complete 2048 game implementation with responsive design
- Knative Serving manifests for dev/staging/prod environments
- Scale-to-zero configuration with environment-specific settings
- Custom domain mapping for wa.darknex.us subdomains
- GitHub Actions workflows for CI/CD
- Docker container with nginx and health checks
- Setup scripts for Knative and Kourier installation
- GHCR integration for container registry

manifests/dev/domain-mapping.yml

@@ -0,0 +1,13 @@
+apiVersion: serving.knative.dev/v1alpha1
+kind: DomainMapping
+metadata:
+  name: 2048-dev.wa.darknex.us
+  namespace: game-2048-dev
+  labels:
+    app: game-2048
+    environment: development
+spec:
+  ref:
+    name: game-2048-dev
+    kind: Service
+    apiVersion: serving.knative.dev/v1