Add ability to specify address in default.project.json (#507)

* Allow for setting the default port in project json

set as
```json
"serveAddress": "0.0.0.0"
```

* Update CHANGELOG.md

* cargo fmt

Co-authored-by: Lucien Greathouse <me@lpghatguy.com>

src/cli/serve.rs

@@ -41,7 +41,10 @@ impl ServeCommand {
 
         let session = Arc::new(ServeSession::new(vfs, &project_path)?);
 
-        let ip = self.address.unwrap_or(DEFAULT_BIND_ADDRESS.into());
+        let ip = self
+            .address
+            .or_else(|| session.serve_address())
+            .unwrap_or(DEFAULT_BIND_ADDRESS.into());
 
         let port = self
             .port