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/setup-database.sql

@@ -0,0 +1,48 @@
+-- Create adminusers table if it doesn't exist
+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
+);
+
+-- Insert temporary admin user
+-- Password: TempAdmin2024!
+-- Bcrypt hash generated with 10 salt rounds
+INSERT INTO adminusers (email, name, passwordhash, role, createdat) 
+VALUES (
+  'admin@skyartshop.com',
+  'Temporary Admin',
+  '$2b$10$YvK5rQE4nHjZH5tVFZ1lNu5iK7Jx/lMQXZvhGEg8sK1vF0N3wL5oG',
+  'superadmin',
+  NOW()
+)
+ON CONFLICT (email) DO UPDATE 
+SET passwordhash = EXCLUDED.passwordhash,
+    name = EXCLUDED.name,
+    role = EXCLUDED.role;
+
+-- Create appusers table for public users (if needed)
+CREATE TABLE IF NOT EXISTS appusers (
+  id SERIAL PRIMARY KEY,
+  email VARCHAR(255) UNIQUE NOT NULL,
+  name VARCHAR(255) NOT NULL,
+  passwordhash TEXT NOT NULL,
+  createdat TIMESTAMP DEFAULT NOW(),
+  lastlogin TIMESTAMP
+);
+
+-- Create sessions table for express-session
+CREATE TABLE IF NOT EXISTS session (
+  sid VARCHAR NOT NULL COLLATE "default",
+  sess JSON NOT NULL,
+  expire TIMESTAMP(6) NOT NULL,
+  PRIMARY KEY (sid)
+);
+
+CREATE INDEX IF NOT EXISTS IDX_session_expire ON session (expire);
+
+SELECT 'Database setup complete!' as status;