add healthz check

Author: elavol

.github/workflows/image.yml

@@ -11,7 +11,7 @@ jobs:
       packages: write
       contents: read
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
       # Sets the latest release tag to env variable ${{ env.LATEST_RELEASE }}
     - name: Get latest release tag

index.php

@@ -35,6 +35,12 @@ function _callParent($function, $args) {
 		exit;
 	}
 
+	if (basename($_SERVER['DOCUMENT_URI'] ?? $_SERVER['REQUEST_URI']) === 'healthz') {
+		header('Content-Type: text/plain');
+		echo 'OK';
+		exit;
+	}
+
 	function adminer_object() {
 		return \docker\adminer_object();
 	}