Experiment with PDF generation

Signed-off-by: David Young <davidy@funkypenguin.co.nz>

Dockerfile

@@ -1,10 +1,24 @@
 ARG FROM_SOURCE=squidfunk/mkdocs-material
 FROM ${FROM_SOURCE}
 
+RUN apk add --no-cache py3-pip py3-pillow py3-cffi py3-brotli gcc musl-dev python3-dev pango build-base libffi-dev jpeg-dev libxslt-dev
+
 RUN pip install \
         mkdocs-autolinks-plugin \
         mkdocs-htmlproofer-plugin \
 	mkdocs-git-revision-date-localized-plugin \
         mkdocs-macros-plugin \
         mkdocs-git-committers-plugin-2 \
-        mkdocs-meta-descriptions-plugin
+        mkdocs-meta-descriptions-plugin \
+        mkdocs-with-pdf
+
+# Theoretically this could add support for headless chrome
+RUN apk add --no-cache \
+      chromium \
+      nss \
+      freetype \
+      harfbuzz \
+      ca-certificates \
+      ttf-freefont \
+      nodejs \
+      yarn