Installing latest yarn

Install prerequites for native modules

Dockerfile

@@ -1,6 +1,6 @@
 FROM node:lts-alpine
 
-RUN apk add --no-cache git
+RUN apk add --no-cache git python2 build-base yarn
 COPY "entrypoint.sh" "/entrypoint.sh"
 ENTRYPOINT ["/entrypoint.sh"]
 CMD ["help"]

README.md

@@ -4,6 +4,9 @@
 
 This Action for [yarn](https://yarnpkg.com) enables arbitrary actions with the `yarn` command-line client, including testing packages and publishing to a registry.
 
+> **Please keep in mind** that this Action was originally written for GitHub Actions beta (when Docker was the only way of doing things).
+Consider using [actions/setup-node](https://github.com/actions/setup-node) to work with Yarn. This repository will be mostly supporting the existing flows.
+
 ## Usage
 
 An example workflow how to install packages via Yarn (using repository syntax):