fixup! chore(ci): faster build

Signed-off-by: skjnldsv <skjnldsv@protonmail.com>

Author: skjnldsv

.github/workflows/sphinxbuild.yml

@@ -15,8 +15,6 @@ jobs:
 
     name: Build ${{ matrix.manual.name }}
     runs-on: ubuntu-latest
-    container:
-      image: ghcr.io/nextcloud/continuous-integration-documentation:documentation-16
 
     strategy:
       matrix:
@@ -59,15 +57,48 @@ jobs:
 
     - name: Checkout repository
       uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-    
-    - name: Verify Python version
-      run: python3 --version
-    
-    - name: Build html documentation
+
+    - name: Cache LaTeX apt packages
+      if: ${{ matrix.manual.build_pdf_path }}
+      uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5.0.4
+      with:
+        path: /var/cache/apt/archives
+        key: latex-apt-${{ runner.os }}-${{ hashFiles('.github/workflows/*.yml') }}
+        restore-keys: |
+          latex-apt-${{ runner.os }}-
+
+    - name: Fix apt cache permissions
+      if: ${{ matrix.manual.build_pdf_path }}
+      run: sudo chmod -R a+r /var/cache/apt/archives
+
+    - name: Install LaTeX dependencies
+      if: ${{ matrix.manual.build_pdf_path }}
       run: |
-        pip install --break-system-packages -r requirements.txt
-        cd ${{ matrix.manual.directory }}
-        make ${{ matrix.manual.make_target }}
+        sudo DEBIAN_FRONTEND=noninteractive apt-get update
+        sudo DEBIAN_FRONTEND=noninteractive apt-get install -y \
+          --no-install-recommends \
+          python3-pil \
+          python3-pip \
+          texlive-fonts-recommended \
+          latexmk \
+          texlive-latex-extra \
+          texlive-latex-recommended \
+          texlive-xetex \
+          texlive-fonts-extra-links \
+          texlive-fonts-extra \
+          xindy
+        sudo chmod -R a+r /var/cache/apt/archives
+
+    - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
+      with:
+        python-version: '3.12'
+        cache: 'pip'
+
+    - name: Install pip dependencies
+      run: pip install -r requirements.txt
+
+    - name: Build html documentation
+      run: cd ${{ matrix.manual.directory }} && make ${{ matrix.manual.make_target }}
 
     - name: Compute PDF release version
       if: ${{ matrix.manual.build_pdf_path }}
@@ -85,6 +116,7 @@ jobs:
       env:
         DOCS_RELEASE: ${{ steps.pdf_version.outputs.release }}
       run: |
+        set -e
         cd ${{ matrix.manual.directory }}
         make latexpdf
         ls -la ${{ matrix.manual.build_pdf_path }}