Replace vite preview with sirv-cli until HTTP2 header compression issue is fixed

[Greenheart]

This issue can be avoided by using another preview server.

1. Add sirv-cli as dev dependency by running npm i -D sirv-cli

2. Replace vite preview with sirv-cli in the serve npm script

// package.json

"scripts": {
    "serve": "sirv web/build --http2 --key priv.pem --cert cert.pem"
}

[Greenheart]

Will be resolved in pagecrypt@3.0.0