fix(test): Fix test server to actually save the code

inventree_phomemo/server.py

@@ -11,13 +11,12 @@ s.listen(1)
 while True:
     conn, addr = s.accept()
     print(addr)
+    printer = open('test.png', 'wb')
     while True:
-        data = conn.recv(9100)
+        data = conn.recv(91000)
         print('data received')
         print('Sending to printer...')
-        
-        printer=open('test.png','wb')
         printer.write(data)
-        printer.close()
         if not data:
             break
+    printer.close()