First movie produced by Robert Kirkman, who is the executive producer and head writer of the series The Walking Dead (2010) and creator of the comic book the show is based on.
Director/co-writer Christian Cantamessa got the idea for the story after reading an article on seed banks.
Plot has some similarities to a 2011 novel called "Wool" written by author Hugh Howey, the novel is set in a dystopian future where the descendants of the survivors of a catastrophe that rendered the surface of the Earth uninhabitable and the air unbreathable live inside large underground silos. The novel was made into a streaming series called Silo (2023).
There is a practical reason for a lot of the technology in the bunker being really old and outdated, it's not the result of a "movie mistake" or a low production budget. As stated the Ark facilities were built inside retrofitted intercontinental ballistic missile (ICBM) silos. All of the ICBM missile silos in the United States were built between 1959 & 1966, and much of the original electronic equipment in those silos remains in use. The launch control safety systems all rely on analog systems and locks (meaning physical keys) and the computers that are part of the launch control system are all pre-internet era computers with the launch codes being stored on 8-inch floppy disks. Specifically the computers that are part of the Strategic Automated Command and Control System, which is used to receive and authenticate emergency launch orders from the President, are IBM Series I workstations from 1976. The reason for this is two fold: first if the computers are not connected to the internet then there is no way for a virus or malware to be remotely sent to them and a floppy disk can't be hacked; second the operating systems on the computers are so old and outdated that modern computer viruses and other malware is not capable of running on them.
When Cartwright is using the computer the sounds of a dial-up modem are heard, he is trying to connect to the internet and contact someone, but Bauer says " you'll never make it work, this piece of crap network wasn't setup for direct communication". As the Ark was built inside an old ICBM silo the network Bauer is referring to is the Strategic Automated Command and Control System, which was designed in the 1960's to send emergency action messages from the National Command Authority at the Pentagon to ICBM facilities, ballistic missile submarines and strategic bombers, which is how an order from the President to launch a nuclear strike is sent. This was one of the very first computer networks ever created, it uses a 300 bit-per-second connection (186.6 times slower than a 56K dial-up modem) and a old protocol that is different than the TCP/IP address protocol the internet uses. The network was designed to be one-way, messages are sent from the National Command Authority to the computers in the silo that authenticate the message and then decrypt the launch codes once the proper floppy disk is inserted. The computers in the silo are not capable of sending any information back on the network, there is no need to. This network is still used as it, and the computers connected to it, are so old no modern computer is capable of connecting to it, and since the computers on this network aren't connected to the internet and have no IP address it is impossible for them to be hacked or have malware sent to them.