address comments

src/providers/node/mod.rs

@@ -221,7 +221,7 @@ impl Provider for NodeProvider {
 
         let mut phases = vec![setup, install, build];
         if let Some(caddy) = SpaProvider::caddy_phase(app, env) {
-            phases.push(caddy); // insert after setup and before build
+            phases.push(caddy);
         }
         let is_spa = SpaProvider::is_spa(app);
 
@@ -337,6 +337,10 @@ impl NodeProvider {
             )));
         }
 
+        if let Some(start) = SpaProvider::start_command(app, env) {
+            return Ok(Some(start));
+        }
+
         let package_manager = NodeProvider::get_package_manager(app);
         if NodeProvider::has_script(app, "start")? {
             return Ok(Some(format!("{package_manager} run start")));

src/providers/node/spa/mod.rs

@@ -7,6 +7,8 @@ use crate::nixpacks::{
 
 pub mod vite;
 
+const NIX_ARCHIVE: &str = "ba913eda2df8eb72147259189d55932012df6301";
+
 pub struct SpaProvider {}
 
 impl SpaProvider {
@@ -26,7 +28,7 @@ impl SpaProvider {
                 || env.get_config_variable("SPA_OUT_DIR").is_some())
         {
             let mut caddy = Phase::new("caddy");
-            caddy.set_nix_archive(String::from("ba913eda2df8eb72147259189d55932012df6301")); // caddy 2.0.4
+            caddy.set_nix_archive(String::from(NIX_ARCHIVE)); // caddy 2.0.4
             caddy.add_nix_pkgs(&[Pkg::new("caddy")]);
             caddy.add_cmd(format!(
                 "caddy fmt --overwrite {}",
@@ -48,4 +50,15 @@ impl SpaProvider {
         // other ones will be implemented here
         vite::ViteSpaProvider::get_output_directory(app)
     }
+
+    pub fn start_command(app: &App, env: &Environment) -> Option<String> {
+        if Self::caddy_phase(app, env).is_some() {
+            Some(format!(
+                "exec caddy run --config {} --adapter caddyfile 2>&1",
+                app.asset_path("Caddyfile")
+            ))
+        } else {
+            None
+        }
+    }
 }

src/providers/node/spa/vite.rs

@@ -86,4 +86,18 @@ mod tests {
         let app = crate::nixpacks::app::App::new("examples/node-vite-solid-ts").unwrap();
         assert_eq!(ViteSpaProvider::get_output_directory(&app), "out");
     }
+
+    #[test]
+    fn test_not_match() {
+        // should not match
+        let app = crate::nixpacks::app::App::new("examples/node-bun-web-server").unwrap();
+        assert!(!ViteSpaProvider::is_vite(&app));
+    }
+
+    #[test]
+    fn test_not_match_2() {
+        // should not match
+        let app = crate::nixpacks::app::App::new("examples/node").unwrap();
+        assert!(!ViteSpaProvider::is_vite(&app));
+    }
 }