Try adding a github action to build and deploy book

Author: brian-rose

.github/workflows/deploy.yaml

@@ -0,0 +1,42 @@
+name: deploy-book
+
+# Only run this when the master branch changes
+on:
+  push:
+    branches:
+    - main
+    # If your git repository has the Jupyter Book within some-subfolder next to
+    # unrelated files, you can make this run only if a file within that specific
+    # folder has been modified.
+    #
+    # paths:
+    # - some-subfolder/**
+
+# This job installs dependencies, build the book, and pushes it to `gh-pages`
+jobs:
+  deploy-book:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+
+    # Install dependencies
+    - name: Set up Python 3.7
+      uses: actions/setup-python@v1
+      with:
+        python-version: 3.7
+
+    - name: Install dependencies
+      run: |
+        pip install -r requirements.txt
+
+    # Build the book
+    - name: Build the book
+      run: |
+        jupyter-book build .
+
+    # Push the book's HTML to github-pages
+    - name: GitHub Pages action
+      uses: peaceiris/actions-gh-pages@v3.6.1
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        publish_dir: ./_build/html

_config.yml

@@ -21,7 +21,7 @@ bibtex_bibfiles:
 
 # Information about where the book exists on the web
 repository:
-  url: https://foundations.projectpythia.org  # Online location of your book
+  url: https://projectpythia.github.io/pythia-foundations  # Online location of your book
   #path_to_book: docs  # Optional path to your book, relative to the repository root
   branch: main  # Which branch of the repository should be used when creating links (optional)