Flesh out the README a bit more

.gitignore

@@ -2,3 +2,4 @@
 .Rhistory
 .RData
 .Ruserdata
+.DS_Store

README.md

@@ -42,3 +42,103 @@ visualize
 Warning message:
 In readLines("./packages") : incomplete final line found on './packages'
 ```
+
+## Setup Github Pages on the Repository
+
+1. Click on the **Settings** tab for the repository
+2. Under "Code and automation", select the **Pages** menu item.
+3. Under the "Source" option select **GitHub Action** from the drop down.
+4. In the "Custom Domain" settings, make sure that **Enforce HTTPS** is checked.
+
+![Example configuration of GitHub Pages](figures/github-pages-configuration-for-org-repository.png)
+
+## Trigger a build
+
+The R WASM Package binaries are either built by updating/committing files in the repository or by manually triggering a workflow deploy.
+
+You can trigger a workflow deploy by:
+
+1. Go to the **Actions** tab of the repository
+2. Selecting the **Build and deploy wasm R package repository** workflow
+3. Clicking on **Run workflow** dropdown
+4. Pressing the **Run workflow** button.
+
+![Example of triggering a manual deployment of the repository](figures/github-pages-trigger-cran-repo-build.png)
+
+## Usage inside webR
+
+Inside of a webR session, you can access the built binaries by using the
+repository’s GitHub Pages URL, e.g.
+
+```
+https://gh-username.github.io/repo-name
+```
+
+This can be set either using `options()` or specifying the location in
+each `webr::install()` call.
+
+The easiest is probably to define the location webR should search for in
+`options()`.
+
+``` r
+# Run once at the start of the session
+options(
+  repos = c("https://gh-username.github.io/repo-name", 
+            "https://repo.r-wasm.org/")
+)
+
+# Call
+webr::install("pkgname")
+```
+
+Otherwise, you can specify it each time:
+
+``` r
+webr::install("pkgname", "https://gh-username.github.io/repo-name")
+```
+
+<div>
+
+> **Important**
+>
+> Please make sure the repository’s [GitHub Pages website is available
+> over
+> `HTTPS`](https://docs.github.com/en/pages/getting-started-with-github-pages/securing-your-github-pages-site-with-https#enforcing-https-for-your-github-pages-site)
+> not `HTTP` (notice the lack of an `s`). You can verify this option was
+> selected by:
+>
+> 1.  Going to the repository’s **Settings** page
+> 2.  Selecting **Pages** under **Code and automation**
+> 3.  Checking the **Enforce HTTPS** button.
+>
+> Otherwise, you will receive the error message of:
+>
+>     Warning: unable to access index for repository http://gh-username.github.io/repo-name/bin/emscripten/contrib/4.3
+
+</div>
+
+## Verify
+
+Go to the [webR REPL Editor](https://webr.r-wasm.org/v0.2.2/) (pinned to
+v0.2.2) and run the following:
+
+``` r
+# Check if package `{drawr}` is installed
+"drawr" %in% installed.packages()[,"Package"]
+# Install the binary from a repository
+webr::install(
+  "drawr", 
+  repos = "https://tutorials.thecoatlessprofessor.com/webr-org-gh-action/"
+)
+# Check to see if the function works
+mat_2x2 <- matrix(1:4, nrow = 2)
+drawr::draw_matrix(mat_2x2, show_cell_indices = TRUE)
+# View help documentation
+?drawr::draw_matrix
+```
+
+You should receive:
+
+![Screenshot of the webR REPL editor showing how to download from
+repository outside of repo.r-wasm.org an R package
+binary](figures/webr-repl-example-workflow.png)