can I use a laptop as a server to run production job everyday?

Of course you can, but why?

In a way, laptop is no different from any other computer with corresponding hardware specifications, but is built with very different goals in mind. A good laptop (should I say "notebook computer"?) is pretty tolerant to tough handling, moving the lid and carrying it around every day, switching on/off, changing power sources; it uses less energy; and it is more compact and light weight. For this features, you pay extra money.

Now, if you take a notebook/laptop computer after someone's everyday use and put it into production as a server, of course it will work. But in this case you are not using its extra features, so your new uses will not stop justifying you past investment.

At the same time, chances are, this computer is less powerful that you need for a server, and is practically not extendable. A typical modern blade-type rack-mounted industrial server computer can add disk volume without shutting it off, has good room for extensions, it has lower cost per performance but it can be too loud and uses more energy. It usually don't have advanced video cards, as its major use is command line or through secure network connection. If has higher reliability and lifetime under the condition of long-term non-stop use. Due to all these reasons, its design goals and hence the design is different from both desktop and portable machines.

[EDIT] In particular, backup requires extra reliability and plenty of storage. Laptop is not adequate, really. [END EDIT]

So, what you want is only good for temporary use.

—SA