feat: Add NetID OAuth provider integration and update login UI

- Implemented NetID OAuth provider in app/auth/oauth.py
- Added styles for NetID login button in app/static/css/styles.css
- Updated login.html to include NetID login option with custom button
- Modified docker-compose.yml to include NetID client credentials
- Enhanced social login setup documentation to include NetID instructions
- Created demo environment configuration file (.env.demo) for easier setup
- Updated .env.template to include NetID configuration options
- Added comprehensive README.md with project features and setup instructions

.env.template

@@ -0,0 +1,72 @@
+# LeagueLedger Environment Configuration Template
+# Copy this file to .env and fill in the values
+
+# Database Configuration
+DB_HOST=localhost
+DB_PORT=5432
+DB_NAME=leagueledger
+DB_USER=postgres
+DB_PASSWORD=
+
+# Application Settings
+SECRET_KEY=
+DEBUG=False
+ALLOWED_HOSTS=localhost,127.0.0.1
+BASE_URL=http://localhost:8000
+TIMEZONE=Europe/Dublin
+
+# Email Configuration
+EMAIL_BACKEND=smtp
+EMAIL_HOST=smtp.example.com
+EMAIL_PORT=587
+EMAIL_USE_TLS=True
+EMAIL_HOST_USER=
+EMAIL_HOST_PASSWORD=
+DEFAULT_FROM_EMAIL=noreply@leagueledger.com
+
+# Security Settings
+SESSION_COOKIE_SECURE=True
+CSRF_COOKIE_SECURE=True
+SECURE_BROWSER_XSS_FILTER=True
+SECURE_CONTENT_TYPE_NOSNIFF=True
+
+# OAuth Providers
+# Google
+GOOGLE_CLIENT_ID=
+GOOGLE_CLIENT_SECRET=
+
+# Facebook
+FACEBOOK_CLIENT_ID=
+FACEBOOK_CLIENT_SECRET=
+
+# GitHub
+GITHUB_CLIENT_ID=
+GITHUB_CLIENT_SECRET=
+
+# LinkedIn
+LINKEDIN_CLIENT_ID=
+LINKEDIN_CLIENT_SECRET=
+
+# Microsoft
+MICROSOFT_CLIENT_ID=
+MICROSOFT_CLIENT_SECRET=
+MICROSOFT_TENANT=common
+
+# Discord
+DISCORD_CLIENT_ID=
+DISCORD_CLIENT_SECRET=
+
+# Authentik
+AUTHENTIK_CLIENT_ID=
+AUTHENTIK_CLIENT_SECRET=
+AUTHENTIK_CONFIG_URL=
+
+# NetID
+NETID_CLIENT_ID=
+NETID_CLIENT_SECRET=
+
+# Feature Flags
+ENABLE_REGISTRATION=True
+ENABLE_PASSWORD_RESET=True
+ENABLE_EMAIL_VERIFICATION=True
+ENABLE_SOCIAL_LOGIN=True