feat: Add script to generate bcrypt password hash

backend/scripts/generate-hash.js

@@ -0,0 +1,52 @@
+#!/usr/bin/env node
+/**
+ * Generate a bcrypt hash for ADMIN_PASSWORD_HASH
+ *
+ * Usage:
+ *   node scripts/generate-hash.js "your-password-here"
+ *
+ * Or run interactively:
+ *   node scripts/generate-hash.js
+ */
+
+const bcrypt = require('bcrypt');
+const readline = require('readline');
+
+const SALT_ROUNDS = 12;
+
+async function generateHash(password) {
+  const hash = await bcrypt.hash(password, SALT_ROUNDS);
+  console.log('\n========================================');
+  console.log('Generated bcrypt hash:');
+  console.log('========================================');
+  console.log(hash);
+  console.log('========================================\n');
+  console.log('Set this as ADMIN_PASSWORD_HASH in your environment.');
+  console.log('For Portainer: paste the hash WITHOUT quotes.\n');
+  return hash;
+}
+
+async function main() {
+  const password = process.argv[2];
+
+  if (password) {
+    await generateHash(password);
+  } else {
+    // Interactive mode
+    const rl = readline.createInterface({
+      input: process.stdin,
+      output: process.stdout
+    });
+
+    rl.question('Enter password to hash: ', async (answer) => {
+      if (answer) {
+        await generateHash(answer);
+      } else {
+        console.log('No password provided.');
+      }
+      rl.close();
+    });
+  }
+}
+
+main().catch(console.error);