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/statefulset.yaml

@@ -0,0 +1,117 @@
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: antigravity
+  labels:
+    app: antigravity
+spec:
+  ports:
+  - port: 5800
+    name: vnc-web
+    protocol: TCP
+  clusterIP: None
+  selector:
+    app: antigravity
+---
+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: antigravity
+spec:
+  serviceName: "antigravity"
+  replicas: 1
+  selector:
+    matchLabels:
+      app: antigravity
+  template:
+    metadata:
+      labels:
+        app: antigravity
+    spec:
+      securityContext:
+        fsGroup: 1000
+        fsGroupChangePolicy: "OnRootMismatch"
+      containers:
+      - name: antigravity
+        image: ghcr.io/cpfarhood/antigravity:latest
+        imagePullPolicy: IfNotPresent
+        ports:
+        - containerPort: 5800
+          name: vnc-web
+          protocol: TCP
+        volumeMounts:
+        - name: userhome
+          mountPath: /home
+        - name: workspace
+          mountPath: /workspace
+        env:
+        # User/Group IDs for the claude user
+        - name: USER_ID
+          value: "1000"
+        - name: GROUP_ID
+          value: "1000"
+        # VNC display settings
+        - name: DISPLAY_WIDTH
+          value: "1920"
+        - name: DISPLAY_HEIGHT
+          value: "1080"
+        - name: SECURE_CONNECTION
+          value: "1"
+        - name: VNC_PASSWORD
+          valueFrom:
+            secretKeyRef:
+              name: antigravity
+              key: vnc-password
+              optional: true
+        # GitHub configuration
+        - name: GITHUB_REPO
+          valueFrom:
+            configMapKeyRef:
+              name: antigravity
+              key: github-repo
+              optional: true
+        - name: GITHUB_TOKEN
+          valueFrom:
+            secretKeyRef:
+              name: antigravity
+              key: github-token
+              optional: true
+        # Happy Coder configuration
+        - name: HAPPY_CODER_API_KEY
+          valueFrom:
+            secretKeyRef:
+              name: antigravity
+              key: happy-coder-api-key
+              optional: true
+        resources:
+          requests:
+            memory: "2Gi"
+            cpu: "1000m"
+          limits:
+            memory: "8Gi"
+            cpu: "4000m"
+        livenessProbe:
+          httpGet:
+            path: /
+            port: 5800
+          initialDelaySeconds: 30
+          periodSeconds: 10
+        readinessProbe:
+          httpGet:
+            path: /
+            port: 5800
+          initialDelaySeconds: 10
+          periodSeconds: 5
+      volumes:
+      - name: workspace
+        emptyDir: {}
+  volumeClaimTemplates:
+  - metadata:
+      name: userhome
+    spec:
+      accessModes: [ "ReadWriteMany" ]
+      storageClassName: "ceph-filesystem"
+      resources:
+        requests:
+          storage: 10Gi