Here are the mu.js and wu.js files that are used to build this site.
What is mu? What is wu?

website/
    mu.js
    wu.js
    md/
        mu.md
        wu.md
        example.md
    css/
        typography.css
        layout.css
    output/ 
        resources

// mu.js

'use strict'

const mu = require('/Users/monk/Studio/Live/mu')
const wu = require('./wu.js')

const build = async () => {
    const rootFolder = './www' 

    try {
        const pages = await mu.readFiles('md')

        for (let page of pages) {
            page.destination = rootFolder
            page.ext = '.html'
            page.content = marked(page.content)
            page.content = wu.layout(page)
            mu.writeFile(page)
        }

        const source = './css'
        const destination = rootFolder + '/resources/bundle.css'
        mu.bundleFiles(source, destination)
    } catch (e) {
        console.error(e)
    }
}

console.log('\n\tmu\n')
build()


// wu.js

'use strict'

const wu = {}

wu.layout = (page) => {
    const enso = (page.isMostlyCode) ?  '' : wu.enso() 

    return `${wu.head(page)}
    <body>
        ${wu.mw()}
        ${enso}
        <div class="wrap ${page.isMostlyCode ? 'wrap--wide' : ''}">
            ${page.content}
            ${wu.footer()}
        </div>
    </body>
    `
}

wu.head = (page) => {
    return `<!doctype html>
    <html lang="en">
    <head>
        <meta charset="utf-8">
        <title>${page.title}</title>
        <meta name="description" content="${page.description || ''}">
        <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
        <link rel="stylesheet" href="./resources/bundle.css">
    </head>`
}

wu.enso = () => {
    return `<img class="enso" src="resources/enso.gif">`
}

wu.mw = () => {
    return `
        <a href="https://monkwest.com">
            <img class="mw-logo" src="./resources/mw.png">
        </a>
    `
}

wu.footer = () => {
    return `
    <div class="footer">
        <a href="https://mobile.twitter.com/monkwest" class="a--invisible">
            <span class="icon-twitter"></span> @monkwest
        </a>
    </div>`
}
@monkwest