docs: simplest readme

README.md

@@ -0,0 +1,53 @@
+# Plain HTTP
+
+This is a simple Rust HTTP library. It provides an `HttpApp` struct that acts as the main structure of the application.
+
+### Example usage
+
+```rust
+use std::collections::HashMap;
+
+use plain_http::*;
+
+fn get_main(_request: HttpRequest) -> HttpAppRouteResponse {
+    if let Some(body) = _request.body {
+        println!("Body {}", body);
+    }
+
+    HttpAppRouteResponse {
+        body: "hello".to_string(),
+        content_type: "text",
+        status: 200,
+        headers: HashMap::new(),
+    }
+}
+
+fn get_test(_request: HttpRequest) -> HttpAppRouteResponse {
+    HttpAppRouteResponse::from_url("./src/assets/index.html")
+}
+
+fn main() {
+    println!("Hello, world!");
+    let mut app = HttpApp {
+        config: HttpAppConfig {
+            port: 3000,
+            max_request_size_bytes: 10000,
+            ..Default::default()
+        },
+        routes: vec![],
+        default_headers: HashMap::new(),
+    };
+
+    app.add_route(HttpAppRoute {
+        route: "/".to_string(),
+        action: Box::new(get_main),
+    });
+
+    app.add_route(HttpAppRoute {
+        route: "/test".to_string(),
+        action: Box::new(get_test),
+    });
+
+    app.start();
+}
+```