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

.gitignore

@@ -0,0 +1,16 @@
+# Cloudron build artifacts
+.cloudronbuild/
+
+# Editor files
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log