Make sure you have pnpm installed on your system. You can install it by npm as well:

npm install -g pnpm

or on any POSIX systems by wget one-line official command:

wget -qO- https://get.pnpm.io/install.sh | sh -

for any specific cases or systems check the official page: https://pnpm.io/installation.

pnpm install

pnpm dev

Look at next.config.js and nextjs redirect docs.

Refer to contribution guide.