lewisdale.dev/config/collections/posts.js

export default function (eleventyConfig) {
    eleventyConfig.addCollection('posts',collectionApi => 
        collectionApi.getFilteredByTag("posts")
            .filter(p => process.env.DEBUG || !p.data.tags.includes("draft"))
            .filter(p => process.env.DEBUG || p.date < new Date())
    );
}