Added script to generate password hashes.

bin/bcrypt.js

@@ -0,0 +1,24 @@
+#!/usr/bin/env node
+
+const bcrypt = require('bcrypt');
+const saltRounds = 10;
+
+const stdout = process.stdout
+const stdin = process.stdin
+
+let password = '';
+
+stdin.on('readable', () => {
+    let chunk;
+    while ((chunk = stdin.read()) !== null) {
+        password += chunk;
+    }
+});
+
+process.stdin.on('end', () => {
+    if (password[password.length - 1] === '\n') {
+        password = password.substring(0, password.length - 1);
+    }
+    const hash = bcrypt.hashSync(password, saltRounds);
+    stdout.write(`${hash}\n`);
+});