this is just an example of how to create a simple static block in gutenberg.
A WordPress plugin is a set of files within the site’s wp-content/plugins directory. For our tutorial, we will use the @wordpress/create-block package to generate the necessary plugin files.
you can use following command to create a plugin with Gutenberg block.
npx @wordpress/create-block gutenberg-static-block
Use npm run build for running once to create a “production” build. This compresses the code down so it downloads faster, but makes it harder to read using browser tools—good for final deployment but not while developing.
Use npm run start for creating a “development” build, this does not compress the code so it is easier to read using browser tools, plus source maps that make debugging easier. Additionally, development build will start a watch process that waits and watches for changes to the file and will rebuild each time it is saved; so you don’t have to run the command for each change.