update readme.md

[Sajiyah-Salat]

I think go get method is deprecated because when I ran
go get github.com/lib/pq
I got:
go: go.mod file not found in current directory or any parent directory.
'go get' is no longer supported outside a module.
To build and install a command, use 'go install' with a version,
like 'go install example.com/cmd@latest'
For more information, see https://golang.org/doc/go-get-install-deprecation
I am a beginner and I dont understand much please help.

[ghost]

Hey! Have you tried running go mod init in your project's root directory?
Give that a try, then run the go get github.com/lib/pq command.

Let me know how that works!