refactor: move cli to root as default

This makes it easier and understandable for users using GitHub Actions, they only have to specify `uses = "bycedric/ci-expo@master"`.

cli/Dockerfile → Dockerfile

@@ -1,6 +1,6 @@
 FROM bycedric/ci-expo:2
 
 LABEL com.github.actions.name="Expo CLI"
-LABEL com.github.actions.description="Use Expo CLI in your GitHub Actions workflow."
+LABEL com.github.actions.description="Use any Expo command in your GitHub Actions workflow."
 LABEL com.github.actions.icon="terminal"
 LABEL com.github.actions.color="gray-dark"

README.md

@@ -1,11 +1,42 @@
 # Expo CLI for GitHub Actions
 
-> Both GitHub Actions and this library are highly unstable, do not use in production.
+> Both GitHub Actions and this library are highly unstable, do not use in production (yet).
 
 Publish, build or manage your [Expo](https://expo.io) Project with GitHub Actions!
 This repository contains a prebuilt base image with GitHub Actions implementations.
 You can also use [the base image](base) in other Docker-based environments.
 
+## Usage
+
+By default, you have full access to the actual [Expo CLI](https://docs.expo.io/versions/latest/workflow/expo-cli).
+That means that you should be able to use every function from the CLI in your actions.
+Below you can see an example workflow to get you started right away!
+
+> Check out both [login](./login) and [publish](./publish) actions for more info.
+
+```hcl
+workflow "Install, Authenticate, and Publish" {
+  on = "push"
+  resolves = ["Publish"]
+}
+
+action "Install" {
+  uses = "actions/npm@master"
+  args = "install"
+}
+
+action "Authenticate" {
+  needs = "Install"
+  uses = "bycedric/ci-expo/login@master"
+  secrets = ["EXPO_USERNAME", "EXPO_PASSWORD"]
+}
+
+action "Publish" {
+  needs = "Authenticate"
+  uses = "bycedric/ci-expo/publish@master"
+}
+```
+
 ## License
 
 The MIT License (MIT). Please see [License File](LICENSE.md) for more information.