Initial commit: Antigravity dev container with Happy Coder

Add containerized GUI development environment featuring:
- Antigravity IDE (VSCode) accessible via web browser
- Happy Coder AI assistant integration
- Automatic GitHub repository cloning on startup
- Persistent user home directory (ReadWriteMany PVC)
- Secure non-root execution as user claude (UID 1000)

Components:
- Dockerfile based on jlesage/baseimage-gui
- Startup scripts for repo initialization and app launch
- Kubernetes manifests (StatefulSet, ConfigMap, Secrets)
- Makefile for build and deployment automation
- Comprehensive documentation

Features:
- Web-based VNC interface (port 5800)
- GitHub token authentication for private repos
- Happy Coder runs as background service in workspace
- CephFS storage for persistent home directory
- Configurable display resolution and security

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

k8s/kustomization.yaml

@@ -0,0 +1,26 @@
+---
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+namespace: default
+
+resources:
+  - configmap.yaml
+  - statefulset.yaml
+  - ingress.yaml
+
+# Uncomment to create secrets from files
+# secretGenerator:
+#   - name: antigravity-secrets
+#     literals:
+#       - github-token=ghp_your_token
+#       - happy-coder-api-key=your_key
+#       - vnc-password=your_password
+
+commonLabels:
+  app: antigravity
+  environment: production
+
+commonAnnotations:
+  managed-by: kustomize
+  description: "Antigravity Dev Container with Happy Coder"