Enhance DNS availability logging and update input placeholder for clarity

app.py

@@ -95,20 +95,16 @@ def dns_is_available(domain, logs_append: Callable[[str], None]):
     # Check NS records first as they're required for valid domains
     try:
         resolver = get_dns_resolver()
-        resolver_nameservers = resolver.nameservers
         for record_type in ['NS', 'A', 'AAAA', 'MX', 'CNAME']:
-            resolver_nameservers = []
             try:
                 resolver.resolve(domain, record_type)
                 return False, record_type, False
             except Exception as e:
                 logs_append(
                     (f"{dns_is_available.__name__}:{record_type}:Exception"
-                     f":{'|'.join(resolver_nameservers)}:{str(e)}"))
+                     f":{'|'.join(resolver.nameservers)}:{str(e)}"))
     except Exception as e:
-        logs_append(
-            (f"{dns_is_available.__name__}"
-             f":Exception:{'|'.join(resolver_nameservers)}:{str(e)}"))
+        logs_append(f"{dns_is_available.__name__}:Exception:{str(e)}")
     return True, None, True
 
 def get_dns_resolver():

index.html

@@ -21,7 +21,7 @@
                         </p>
                         <form id="searchForm" class="mb-3 mt-4">
                             <div class="input-group">
-                                <input type="text" id="domain" class="form-control" placeholder="Enter domain name...">
+                                <input type="text" id="domain" class="form-control" placeholder="Enter domain name... eg: example.com">
                                 <button class="btn btn-primary" type="submit">Check</button>
                             </div>
                         </form>