HTTPS and TLS
HTTPS = HTTP + TLS/SSL， Encrypt transmission data to prevent eavesdropping and tampering. SSL certificate is required, Let's Encrypt provides free certificate.
Content Security Policy (CSP)
Restricting resource loading sources through HTTP headers to prevent XSS attacks. Only allow loading of local scripts and CDN whitelist resources.
Security Response Head
Common security headers: Strict Transport Security, X-Frame-Options, X-Content-Type-Options.
Other protections
Set Secure/HttpOnly Cookies, CSRF Token, Input Validation and Output Encoding, and regularly update dependencies.
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