fix(ci): correct playwright config paths and add env example files

- Fix testDir path from './src/__tests__/e2e' to './e2e'
- Fix globalSetup path from './src/__tests__/e2e/global.setup' to './e2e/global.setup'
- Create .env.development.example with development database configuration
- Update .gitignore to allow .env.example files to be tracked

.env.example

@@ -0,0 +1,54 @@
+# EuchreCamp Environment Configuration
+# Copy this file to .env and fill in your values
+
+# ============================================
+# Database Configuration
+# ============================================
+# PostgreSQL connection string
+# Format: postgresql://username:password@host:port/database
+DATABASE_URL=postgresql://euchre:euchrepassword@localhost:5432/euchre_camp
+
+# Shadow database for Prisma migrations (optional for PostgreSQL)
+DATABASE_SHADOW_URL=postgresql://euchre:euchrepassword@localhost:5432/euchre_camp_shadow
+
+# Database provider (postgresql, mysql, sqlite, etc.)
+DATABASE_PROVIDER=postgresql
+
+# ============================================
+# Better Auth Configuration
+# ============================================
+# Secret key for session encryption (generate a strong random string)
+# Run: openssl rand -base64 32
+BETTER_AUTH_SECRET=your-secret-key-change-in-production
+
+# Base URL for authentication callbacks
+# For production: https://your-domain.com
+BETTER_AUTH_URL=http://localhost:3000
+
+# ============================================
+# Application Configuration
+# ============================================
+# Environment: development, production, test
+NODE_ENV=production
+
+# Trusted origins for CORS and authentication
+# Add your domain(s) for production
+TRUSTED_ORIGINS=http://localhost:3000,http://127.0.0.1:3000
+
+# ============================================
+# Optional: External Services
+# ============================================
+# If using external database (e.g., Supabase, Railway)
+# DATABASE_URL=postgresql://user:pass@host:port/db
+
+# If using external auth provider
+# BETTER_AUTH_URL=https://your-app.com
+
+# ============================================
+# CasaOS Deployment Notes
+# ============================================
+# When deploying to CasaOS, set these via the UI:
+# 1. DATABASE_URL: Your PostgreSQL connection string
+# 2. BETTER_AUTH_SECRET: Generate with: openssl rand -base64 32
+# 3. BETTER_AUTH_URL: Your app's public URL
+# 4. TRUSTED_ORIGINS: Your app's public URL(s)