Migrate to use jupyter-book for building

.github/workflows/ci.yml

@@ -1,4 +1,4 @@
-name: Build Project [myst]
+name: Build Project [using jupyter-book]
 on: [push]
 jobs:
   tests:
@@ -15,21 +15,24 @@ jobs:
           python-version: 3.8
           environment-file: environment.yml
           activate-environment: qe-lectures
-      - name: Install sphinxcontrib-tomyst
-        shell: bash -l {0}
-        run: |
-          git clone https://github.com/QuantEcon/sphinxcontrib-tomyst
-          cd sphinxcontrib-tomyst && python setup.py install
       - name: Install quantecon-book-theme
         shell: bash -l {0}
         run: |
           git clone https://github.com/QuantEcon/quantecon-book-theme
           cd quantecon-book-theme
           python setup.py install
+          cd ../ && rm -rf quantecon-book-theme
+      - name: Install sphinx-multitoc-numbering
+        shell: bash -l {0}
+        run: |
+          git clone https://github.com/executablebooks/sphinx-multitoc-numbering.git
+          cd sphinx-multitoc-numbering
+          python setup.py install
+          cd ../ && rm -rf sphinx-multitoc-numbering
       - name: Install Dependencies
         shell: bash -l {0}
         run: |
-          pip install myst-nb
+          pip install jupyter-book
       - name: Display Conda Environment Versions
         shell: bash -l {0}
         run: conda list
@@ -39,8 +42,7 @@ jobs:
       - name: Build HTML
         shell: bash -l {0}
         run: |
-          pwd
-          make html
+          jb build lectures --path-output ./
       - name: Preview Deploy to Netlify
         uses: nwtgck/actions-netlify@v1.1
         with: