fix: make image endpoint highest priority (#12591)

* fix: make image endpoint highest priority

* Use config for endpoint

* Add test

.changeset/plenty-carrots-nail.md

@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Fixes a bug where a catchall route would match an image endpoint request

packages/astro/src/assets/endpoint/config.ts

@@ -13,7 +13,7 @@ export function injectImageEndpoint(
 	mode: 'dev' | 'build',
 	cwd?: string,
 ) {
-	manifest.routes.push(getImageEndpointData(settings, mode, cwd));
+	manifest.routes.unshift(getImageEndpointData(settings, mode, cwd));
 }
 
 export function ensureImageEndpointRoute(
@@ -22,8 +22,8 @@ export function ensureImageEndpointRoute(
 	mode: 'dev' | 'build',
 	cwd?: string,
 ) {
-	if (!manifest.routes.some((route) => route.route === '/_image')) {
-		manifest.routes.push(getImageEndpointData(settings, mode, cwd));
+	if (!manifest.routes.some((route) => route.route === settings.config.image.endpoint.route)) {
+		manifest.routes.unshift(getImageEndpointData(settings, mode, cwd));
 	}
 }