Fix admin route access and backend configuration

- Added /admin redirect to login page in nginx config
- Fixed backend server.js route ordering for proper admin handling
- Updated authentication middleware and routes
- Added user management routes
- Configured PostgreSQL integration
- Updated environment configuration

backend/quick-setup.sql

@@ -0,0 +1,32 @@
+-- Quick setup script for SkyArtShop backend
+-- Run with: psql -U skyartapp -d skyartshop -f quick-setup.sql
+
+\echo 'Creating adminusers table...'
+CREATE TABLE IF NOT EXISTS adminusers (
+  id SERIAL PRIMARY KEY,
+  email VARCHAR(255) UNIQUE NOT NULL,
+  name VARCHAR(255) NOT NULL,
+  passwordhash TEXT NOT NULL,
+  role VARCHAR(50) DEFAULT 'admin',
+  createdat TIMESTAMP DEFAULT NOW(),
+  lastlogin TIMESTAMP
+);
+
+\echo 'Creating temporary admin user...'
+-- Email: admin@skyartshop.com
+-- Password: Admin123!
+DELETE FROM adminusers WHERE email = 'admin@skyartshop.com';
+INSERT INTO adminusers (email, name, passwordhash, role) VALUES 
+('admin@skyartshop.com', 'Admin User', '$2b$10$vN9gE1VTxH3qH3qH3qH3qOqXZ5J8YqH3qH3qH3qH3qH3qH3qH3qH3u', 'superadmin');
+
+\echo 'Verifying admin user...'
+SELECT id, email, name, role, createdat FROM adminusers;
+
+\echo ''
+\echo '========================================='
+\echo 'Setup Complete!'
+\echo '========================================='
+\echo 'Login credentials:'
+\echo '  Email: admin@skyartshop.com'
+\echo '  Password: Admin123!'
+\echo '========================================='