yarn install
Install all the dependencies listed within package.json
Options
| Name | Description | 
|---|---|
| -s, --silent | Skip Yarn console logs | 
| --no-default-rc | Prevent Yarn from automatically detecting yarnrc and npmrc files | 
| --use-yarnrc  <path> | Specifies a yarnrc file that Yarn should use (.yarnrc only, not .npmrc) (default: ) | 
| --verbose | Output verbose messages on internal operations | 
| --offline | Trigger an error if any required dependencies are not available in local cache | 
| --prefer-offline | Use network only if dependencies are not available in local cache | 
| --enable-pnp, --pnp | Enable the Plug'n'Play installation | 
| --json | Format Yarn log messages as lines of JSON | 
| --ignore-scripts | Don't run lifecycle scripts | 
| --har | Save HAR output of network traffic | 
| --ignore-platform | Ignore platform checks | 
| --ignore-engines | Ignore engines check | 
| --ignore-optional | Ignore optional dependencies | 
| --force | Install and build packages even if they were built before, overwrite lockfile | 
| --skip-integrity-check | Run install without checking if node_modules is installed | 
| --check-files | Install will verify file tree of packages for consistency | 
| --no-bin-links | Don't generate bin links when setting up packages | 
| --flat | Only allow one version of a package | 
| --prod, --production | Instruct Yarn to ignore NODE_ENV and take its production-or-not status from this flag instead | 
| --no-lockfile | Don't read or generate a lockfile | 
| --pure-lockfile | Don't generate a lockfile | 
| --frozen-lockfile | Don't generate a lockfile and fail if an update is needed | 
| --update-checksums | Update package checksums from current repository | 
| --link-duplicates | Create hardlinks to the repeated modules in node_modules | 
| --link-folder  <path> | Specify a custom folder to store global links | 
| --global-folder  <path> | Specify a custom folder to store global packages | 
| --modules-folder  <path> | Rather than installing modules into the node_modules folder relative to the cwd, output them here | 
| --preferred-cache-folder  <path> | Specify a custom folder to store the yarn cache if possible | 
| --cache-folder  <path> | Specify a custom folder that must be used to store the yarn cache | 
| --mutex  <type[:specifier]> | Use a mutex to ensure only one yarn instance is executing | 
| --emoji  <arg> | Enables emoji in output | 
| --cwd  <cwd> | Working directory to use | 
| --proxy, --https-proxy  <host> | |
| --registry  <url> | Override configuration registry | 
| --no-progress | Disable progress bar | 
| --network-concurrency  <number> | Maximum number of concurrent network requests | 
| --network-timeout  <milliseconds> | TCP timeout for network requests | 
| --non-interactive | Do not show interactive prompts | 
| --scripts-prepend-node-path | Prepend the node executable dir to the PATH in scripts | 
| --no-node-version-check | Do not warn when using a potentially unsupported Node version | 
| --focus | Focus on a single workspace by installing remote copies of its sibling workspaces | 
| --otp  <otpcode> | One-time password for two factor authentication | 
| -A, --audit | Run vulnerability audit on installed packages | 
| -h, --help | Output usage information |