feat(security): implement bcrypt hashing for admin password and cleanup Dockerfile

scripts/hash-password.js

@@ -0,0 +1,21 @@
+const bcrypt = require('bcryptjs');
+
+const password = process.argv[2];
+
+if (!password) {
+    console.error('Please provide a password to hash.');
+    console.error('Usage: node scripts/hash-password.js <password>');
+    process.exit(1);
+}
+
+const saltRounds = 10;
+
+bcrypt.hash(password, saltRounds, (err, hash) => {
+    if (err) {
+        console.error('Error hashing password:', err);
+        return;
+    }
+    console.log('Plaintext:', password);
+    console.log('Bcrypt Hash:', hash);
+    console.log('\nSet this hash as your ADMIN_PASSWORD environment variable.');
+});