Add API and web application design documents

README.md

@@ -38,6 +38,9 @@ Dokumentace/
 │   ├── DESIGN_DOCUMENT_GODOT.md         # Guidelines for Godot projects
 │   └── .gitignore                       # Godot-specific ignore rules
 │
+├── API/                                 # API design guidelines
+│   └── DESIGN_DOCUMENT_API.md           # Guidelines for projects exposing an HTTP API
+│
 ├── Project template/                    # Reusable files for new projects
 │   ├── CHANGELOG.md                     # Changelog template
 │   ├── PROJECT.md                       # Project documentation template
@@ -67,6 +70,7 @@ Where the two disagree, **the design document wins**.
 | Rust (application) | `Rust/DESIGN_DOCUMENT_RUST.md` |
 | Rust (library) | `Rust/DESIGN_DOCUMENT_RUST_LIB.md` |
 | Godot | `Godot/DESIGN_DOCUMENT_GODOT.md` |
+| Any project exposing an HTTP API | `API/DESIGN_DOCUMENT_API.md` (in addition to the language document) |
 
 ### Starting a new project