Add start script to package.json and enhance CI workflow for deployment

- Introduced a new "start" script in package.json to run the built application.
- Updated the CI workflow to include environment variables for deployment.
- Added steps for uploading build artifacts and deploying to a server using sshpass.
- Configured the deployment process to ensure the application runs on the specified port.

package.json

@@ -7,6 +7,7 @@
 		"dev": "vite dev",
 		"build": "vite build",
 		"preview": "vite preview",
+		"start": "node build",
 		"prepare": "svelte-kit sync || echo ''",
 		"check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
 		"check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch"