feat: update Docker configuration for improved performance and add local environment example

.env.local.example

@@ -0,0 +1,19 @@
+# =====================================================
+# MyEasyCMS v2 — Local Development Environment
+# Copy to .env and run: docker compose -f docker-compose.local.yml up -d
+# =====================================================
+
+# --- Database ---
+POSTGRES_PASSWORD=postgres
+
+# --- Supabase Auth ---
+JWT_SECRET=super-secret-jwt-token-with-at-least-32-characters-long
+
+# --- Supabase Keys (demo keys — safe for local dev only) ---
+SUPABASE_ANON_KEY=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZS1kZW1vIiwicm9sZSI6ImFub24iLCJleHAiOjE5ODM4MTI5OTZ9.CRXP1A7WOeoJeXxjNni43kdQwgnWNReilDMblYTn_I0
+SUPABASE_SERVICE_ROLE_KEY=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZS1kZW1vIiwicm9sZSI6InNlcnZpY2Vfcm9sZSIsImV4cCI6MTk4MzgxMjk5Nn0.EGIM96RAZx35lJzdJsyH-qQwv8Hdp7fsn3W0YpN81IU
+
+# --- Stripe (test keys) ---
+# Get your own test keys from https://dashboard.stripe.com/test/apikeys
+NEXT_PUBLIC_STRIPE_PUBLISHABLE_KEY=pk_test_YOUR_KEY
+STRIPE_SECRET_KEY=sk_test_YOUR_KEY