docs: update the docs

docs/guide/src/tutorial/new_app.md

@@ -1 +1,34 @@
 # New app
+
+To get started, let's create a new Rust project for our app. 
+
+```shell
+$ cargo new --bin weatherapp
+$ cd weatherapp
+```
+
+Make sure our project builds by default
+
+```shell
+$ cargo run
+
+   Compiling weatherapp v0.1.0
+    Finished dev [unoptimized + debuginfo] target(s) in 0.41s
+     Running `target/debug/weatherapp`
+Hello, world!
+```
+
+## Adding Dioxus Desktop as a dependency
+
+We can either edit our Cargo.toml directly:
+
+```toml
+[dependencies]
+dioxus = { version = "*", features = ["desktop"]}
+```
+
+or use `cargo-edit` to add it via the CLI:
+
+```shell
+$ cargo add dioxus --features desktop
+```