Tiny Node.js server for serving the latest line entered on stdin.

node-serve-line

const port = process.env.PORT || 4258;
const hostname = '0.0.0.0';

let content = null;

require('http')
    .createServer((req, res) => res.end(content))
    .listen(port, hostname, () => console.log(`Listening on http://${hostname}:${port}`));

require('readline')
    .createInterface({input: process.stdin, output: process.stdout, terminal: false})
    .on('line', line => {
        line = line.trim();
        if (line) content = line;
    });