Error while installing homebrew

I'm trying to install homebrew through this command in terminal

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

but I'm facing an error as

curl: (6) Could not resolve host: raw.githubusercontent.com

I also couldn't find the .zshrc hidden file.

It would be a pleasure if someone could guide me to rectify this error, I'm trying to install homebrew for the installation of MongoDB.