fix: broken build for 7.0.0

Due to a change in Laravel 10, an app without a .env file now yields a
500 error. As we expect http://localhost/ to return 200, this change
    broke the build. To ensure the HTTP server work, we only need to
    check for a static image (sw.js).

Dockerfile

@@ -104,4 +104,4 @@ EXPOSE 80
 
 # Check that the homepage is displayed
 HEALTHCHECK --interval=5m --timeout=5s \
-  CMD curl -f http://localhost/ || exit 1
+  CMD curl -f http://localhost/sw.js || exit 1

goss.yaml

@@ -21,7 +21,7 @@ file:
     owner: www-data
     group: www-data
     filetype: file
-    contains:
+    contents:
     - v7.0.0
   /var/www/html/artisan:
     exists: true
@@ -88,6 +88,7 @@ port:
 service:
   apache2:
     enabled: true
+    skip: false
     running: true
 user:
   www-data:
@@ -113,10 +114,10 @@ process:
   apache2:
     running: true
 http:
-  http://localhost:
+  http://localhost/sw.js:
     status: 200
     allow-insecure: false
     no-follow-redirects: false
     timeout: 5000
     body:
-    - <title>Koel</title>
+    - workbox