Important info for readme.md and website

[ayoayco]

• [ ] Server setup script current limitations and plans
• [ ] non-standard Document fragments and plans for path to generating custom elements
• [ ] Plans for build modes (static, hybrid)
• [ ] Content support plans
• [ ] Deployment options and instructions
• [ ] Contributing guide (code, ideas, templates, showcases, etc.)
• [ ] Inspirations, credits, alternatives, motivations