Developer documentation

This section is for developers, agencies and technical administrators who build and maintain websites on OS Cloud. The guides combine practical implementation steps with guidance on risks, verification and rollback.

Choose a topic

• Security: reduce the attack surface, configure security headers, and manage updates and sessions.
• Performance: improve caching, images, fonts and Core Web Vitals.
• SEO: manage indexing, sitemaps and structured data.
• Accessibility: apply WCAG, semantic HTML and ARIA responsibly.
• Platform: configure PHP, Redis and other runtime features.

Test changes first

Create a restorable backup before making significant changes and test them in a staging environment whenever possible. Document both the change and the rollback procedure.

Start with Configure PHP, HTTP security headers or PageSpeed Insights.