fix: fixes potential issue if machine hostname cannot be determined

app/util/health_server.rb

@@ -26,7 +26,7 @@ class HealthServer
   private
 
   def root
-    [200, { "Content-Type" => "text/plain" }, ["#{@name} (pid: #{Process.pid}, host: #{Socket.gethostname})"]]
+    [200, { "Content-Type" => "text/plain" }, ["#{@name} (pid: #{Process.pid}, host: #{hostname})"]]
   end
 
   def ok
@@ -43,6 +43,12 @@ class HealthServer
     [200, { "Content-Type" => "text/plain" }, [body]]
   end
 
+  def hostname
+    Socket.gethostname
+  rescue StandardError
+    "unknown-hostname"
+  end
+
   class << self
 
     def run(default_port: 9090, **options)