added anvilserver.py to repo

anvilserver.py

@@ -0,0 +1,9 @@
+import anvil.server
+
+anvil.server.connect('55MH4EBKM22EP4E6D5T6CVSL-VGO5X4SM6JEXGJVT')
+
+@anvil.server.callable
+def server_function(arg):
+    return arg+' called anvilserver.py'
+
+anvil.server.wait_forever()