install

```bash
# first deinstall yarn to be safe
npm i -g corepack
corepack prepare yarn@<version> --activate
yarn --version
# Should print 3.X.X or above
```

for node <16.10

```bash
# first deinstall yarn to be safe
corepack enable
corepack prepare yarn@stable --activate
yarn --version
# Should print 3.X.X or above
```

for node >=16.10

then to setup a project

```bash
cp yarnrc.yml your-project-dir/.yarnrc.yml
cp env.example your-project-dir/.env
cat gitignore >> your-project-dir/.gitignore
# Then uncomment one of the possibilities in gitignore
```