Add GH action

.Rbuildignore

@@ -1,2 +1,3 @@
 ^demorwasmbinary\.Rproj$
 ^\.Rproj\.user$
+^\.github$

.github/.gitignore

@@ -0,0 +1 @@
+*.html

.github/workflows/deploy-cran-repo.yml

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+# Workflow derived from https://github.com/r-wasm/actions/tree/v1/examples
+# Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
+on:
+  push:
+    # Only build on main or master branch
+    branches: [main, master]
+  # Or when triggered manually
+  workflow_dispatch:
+
+name: Build and deploy wasm R package repository
+
+jobs:
+  # Reads `./packages` for package references to put
+  # into a CRAN-like repository hosted on GitHub pages
+  deploy-cran-repo:
+    uses: r-wasm/actions/.github/workflows/deploy-cran-repo.yml@v1
+    permissions:
+      # To download GitHub Packages within action
+      repository-projects: read
+      # For publishing to pages environment
+      pages: write
+      id-token: write

README.md

@@ -1,2 +1,13 @@
 # webr-github-action-wasm-binaries
+
 Example GitHub Actions workflow with an R package that generates developmental webR binaries
+
+## Steps
+
+1. Deployed
+
+```r
+usethis::use_github_action(
+  url = "https://raw.githubusercontent.com/r-wasm/actions/v1/examples/deploy-cran-repo.yml"
+)
+```