add examples for crypto and zlib

Sascha Schulz

2024-09-16 e3de9fd281958e70d1801c2c3681634933b8e932

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const fs = require("fs"); 
 
const readStream = fs.createReadStream("./in.txt"); 
const writeStream = fs.createWriteStream("./out.txt"); 
 
readStream.on("data", (data /* Buffer */) => { 
    // process data here 
    writeStream.write(data) 
}); 
 
readStream.on("end", (data) => { 
    // stream has finished, e.g. EOF (end of file) 
});