worker: add HEAD support for health/sftp-test

worker.py

@@ -20,6 +20,25 @@ if not API_BASE or not WORKER_TOKEN:
 
 
 class Handler(BaseHTTPRequestHandler):
+
+    def do_HEAD(self):
+        path = self.path.split("?", 1)[0]
+
+        if path in ("/", "/health"):
+            self.send_response(200)
+            self.end_headers()
+            return
+
+        if path == "/sftp-test":
+            # no body on HEAD
+            self.send_response(200)
+            self.end_headers()
+            return
+
+        # if you have /api/pdf routes in worker, add them here too
+        self.send_response(404)
+        self.end_headers()
+
     def do_GET(self):
         path = self.path.split('?', 1)[0]