feat: add IDE choice — VSCode (default), Google Antigravity, SSH

- Add `ide` Helm value with options: vscode, antigravity, ssh
- Dockerfile: install Google Antigravity via apt and openssh-server
- scripts/startapp.sh: branch on IDE env var to launch the right app
- scripts/cont-init-sshd.sh: start sshd as root in SSH mode, set up
  authorized_keys from SSH_AUTHORIZED_KEYS env var
- chart/templates/deployment.yaml: pass IDE env var, conditional ports
  and probes (HTTP for VNC modes, TCP socket for SSH mode)
- chart/templates/service.yaml: expose port 5800 (VNC) or 22 (SSH)
- chart/values.yaml: add ide field with documentation
- README.md: document IDE choice, fix stale happyHomeDir references
- chart/Chart.yaml: bump to 0.1.5

Closes #10

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

chart/Chart.yaml

@@ -2,5 +2,5 @@ apiVersion: v2
 name: devcontainer
 description: Antigravity Dev Container with Happy Coder AI assistant
 type: application
-version: 0.1.4
+version: 0.1.5
 appVersion: "latest"

chart/templates/deployment.yaml

@@ -25,10 +25,18 @@ spec:
           image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
           imagePullPolicy: {{ .Values.image.pullPolicy }}
           ports:
+            {{- if eq (.Values.ide | default "vscode") "ssh" }}
+            - containerPort: 22
+              name: ssh
+              protocol: TCP
+            {{- else }}
             - containerPort: 5800
               name: vnc-web
               protocol: TCP
+            {{- end }}
           env:
+            - name: IDE
+              value: {{ .Values.ide | default "vscode" | quote }}
             - name: USER_ID
               value: {{ .Values.userId | quote }}
             - name: GROUP_ID
@@ -60,6 +68,7 @@ spec:
               mountPath: /home
             - name: workspace
               mountPath: /workspace
+          {{- if ne (.Values.ide | default "vscode") "ssh" }}
           livenessProbe:
             httpGet:
               path: /
@@ -72,6 +81,18 @@ spec:
               port: 5800
             initialDelaySeconds: 10
             periodSeconds: 5
+          {{- else }}
+          livenessProbe:
+            tcpSocket:
+              port: 22
+            initialDelaySeconds: 15
+            periodSeconds: 10
+          readinessProbe:
+            tcpSocket:
+              port: 22
+            initialDelaySeconds: 5
+            periodSeconds: 5
+          {{- end }}
       volumes:
         - name: workspace
           emptyDir: {}

chart/templates/service.yaml

@@ -6,9 +6,16 @@ metadata:
     {{- include "antigravity.labels" . | nindent 4 }}
 spec:
   ports:
+    {{- if eq (.Values.ide | default "vscode") "ssh" }}
+    - port: 22
+      name: ssh
+      protocol: TCP
+      targetPort: ssh
+    {{- else }}
     - port: 5800
       name: vnc-web
       protocol: TCP
       targetPort: vnc-web
+    {{- end }}
   selector:
     {{- include "antigravity.labels" . | nindent 4 }}

chart/values.yaml

@@ -9,6 +9,14 @@ image:
 # GitHub repository to clone into /workspace
 githubRepo: ""
 
+# IDE to launch inside the container.
+# Options:
+#   vscode      — VSCode via VNC browser UI on port 5800 (default)
+#   antigravity — Google Antigravity (VSCode fork) via VNC on port 5800
+#   ssh         — OpenSSH server on port 22 (no VNC GUI)
+#                 Requires SSH_AUTHORIZED_KEYS in the env secret.
+ide: vscode
+
 # Happy Coder endpoints
 happyServerUrl: "https://happy.farh.net"
 happyWebappUrl: "https://happy-coder.farh.net"