Initial Blinko Cloudron package

- CloudronManifest.json with PostgreSQL and localstorage addons
- Dockerfile based on cloudron/base:5.0.0
- NGINX reverse proxy configuration
- Supervisor process management
- Initialization script with auto-configuration

CloudronManifest.json

@@ -0,0 +1,30 @@
+{
+  "id": "io.blinko.cloudronapp",
+  "title": "Blinko",
+  "author": "Blinko Space",
+  "description": "AI-powered card note-taking application for capturing fleeting thoughts with RAG-enhanced search, markdown support, and self-hosted privacy.",
+  "tagline": "AI-powered note-taking",
+  "version": "1.0.0",
+  "healthCheckPath": "/",
+  "httpPort": 8000,
+  "addons": {
+    "postgresql": {},
+    "localstorage": {}
+  },
+  "manifestVersion": 2,
+  "website": "https://blinko.mintlify.app/",
+  "contactEmail": "support@blinko.space",
+  "icon": "file://logo.png",
+  "tags": [
+    "notes",
+    "ai",
+    "productivity",
+    "markdown"
+  ],
+  "memoryLimit": 512000000,
+  "minBoxVersion": "7.0.0",
+  "postInstallMessage": "Blinko has been installed successfully!\n\nVisit your Blinko instance to create your first account.\nThe first user to register will become the administrator.\n\nData is stored in /app/data and will be backed up automatically.",
+  "changelog": {
+    "1.0.0": "Initial Cloudron package"
+  }
+}