update actions yml to use docker and cacheing

.github/workflows/build-docs.yml

@@ -12,29 +12,40 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    container:
+      image: rocker/verse:latest
 
     steps:
     - name: Checkout code
       uses: actions/checkout@v3
 
-    - name: Set up R environment
-      uses: r-lib/actions/setup-r@v2
+    # Add cache for R packages
+    - name: Cache R packages
+      uses: actions/cache@v3
+      with:
+        path: /usr/local/lib/R/site-library
+        key: ${{ runner.os }}-r-${{ hashFiles('**/DESCRIPTION') }}
+        restore-keys: |
+          ${{ runner.os }}-r-
+
+    # Add cache for APT packages
+    - name: Cache APT packages
+      uses: actions/cache@v3
+      with:
+        path: /var/cache/apt/archives
+        key: ${{ runner.os }}-apt-${{ hashFiles('**/build-docs.yml') }}
 
     - name: Install LaTeX
       run: |
-        sudo apt-get update
-        sudo apt-get install -y texlive-latex-base texlive-latex-extra texlive-fonts-recommended texlive-xetex
+        apt-get update
+        apt-get install -y texlive-latex-base texlive-latex-extra texlive-fonts-recommended texlive-xetex
 
     - name: Install R packages
       run: |
-        Rscript -e 'install.packages(c("rmarkdown", "tools"))'
-
-    - name: Install Sweave (if not included)
-      run: |
-        Rscript -e 'install.packages("utils")'
+        Rscript -e 'install.packages(c("rmarkdown", "tools", "utils"))'
 
     - name: Run Makefile
-      working-directory: IntroML/assignments
+      working-directory: assignments
       run: |
         make all