We've been shipping MVPs long before those were a thing.
./deploy.sh runs the commands you used to run manually.
What problem are you solving now with containers?
Listen to what you are saying: "It will take little time" and "it will be worth it down the line". These are bets. People get this wrong all the time.
Don't take the bet. That's happy path thinking. Take the shell script and 0 dependencies on external services and complex software.