Add starter code for warp

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Cargo.toml

@@ -7,3 +7,7 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+operational-transform = "0.6.0"
+warp = "0.3.1"
+tokio = { version = "1.6.1", features = ["full"] }
+dotenv = "0.15.0"

src/main.rs

@@ -1,3 +1,20 @@
-fn main() {
-    println!("Hello, world!");
+use warp::{filters::BoxedFilter, Filter, Reply};
+
+fn server() -> BoxedFilter<(impl Reply,)> {
+    (warp::path!("hello" / String).map(|name| format!("Hello, {}!", name)))
+        .or(warp::path::end().map(|| "Home page"))
+        .boxed()
+}
+
+#[tokio::main]
+async fn main() {
+    dotenv::dotenv().ok();
+
+    let port = std::env::var("PORT")
+        .unwrap_or("3030".to_string())
+        .parse()
+        .expect("Unable to parse PORT");
+
+    println!("Server listening on http://localhost:{}", port);
+    warp::serve(server()).run(([0, 0, 0, 0], port)).await;
 }