update Dockerfile using mkdocs-1.3.1, mkdocs-materia-8.3.9, build for adm64 and arm64

Author: PhilippSalvisberg

docker/Dockerfile

@@ -1,12 +1,20 @@
-FROM oraclelinux:8
+FROM oraclelinux:8.6
+ARG TARGETPLATFORM
 
 LABEL maintainer="philipp.salvisberg@trivadis.com"
 LABEL description="Tools to generate HTML and PDF using Materials for MkDocs and wkhtmltopdf."
-LABEL build.command="docker build . --tag trivadis/mktools:latest"
+
+# To build a mulit-architecture image and push it to the docker registry (load is not supported)
+LABEL build.prepare.command="docker buildx create --use --name mktools"
+LABEL build.multiarch.command="docker buildx build --platform linux/amd64,linux/arm64 . --tag trivadis/mktools:latest --push"
+
+# To build a single-architecture image and load it into local docker images list (not possible for multi-architecture images)
+LABEL build.amd64.command="docker buildx build --platform linux/amd64 . --tag trivadis/mktools:latest --load"
+LABEL build.arm64.command="docker buildx build --platform linux/ard64 . --tag trivadis/mktools:latest --load"
 
 # install python
 RUN dnf -y update
-RUN dnf -y install python38 python38-pip
+RUN dnf -y install python39 python39-pip
 
 # install git
 RUN dnf -y install git
@@ -15,14 +23,23 @@ RUN dnf -y install git
 # using "--root" should suppress "WARNING: Running pip install with root privileges is generally not a good idea." in future releases
 RUN python3 -m pip install --upgrade pip --root /
 RUN python3 -m pip install --root / \
-        'mkdocs==1.1.2' \
-        'mkdocs-material==6.2.8' \
-        'mkdocs-awesome-pages-plugin==2.5.0' \
-        'pymdown-extensions==8.1.1' \
-        'mike==0.5.5' 
-
-# install wkhtmltox 0.12.6
-RUN dnf -y install https://github.com/wkhtmltopdf/packaging/releases/download/0.12.6-1/wkhtmltox-0.12.6-1.centos8.x86_64.rpm
+        'mkdocs==1.3.1' \
+        'mkdocs-material==8.3.9' \
+        'mkdocs-awesome-pages-plugin==2.8.0' \
+        'pymdown-extensions==9.5' \
+        'mike==1.1.2' \
+        'setuptools==63.4.2'
+
+# install wkhtmltox 0.12.6.1 r2
+RUN if [ "$TARGETPLATFORM" == "linux/amd64" ] ; \
+    then dnf -y install https://github.com/wkhtmltopdf/packaging/releases/download/0.12.6.1-2/wkhtmltox-0.12.6.1-2.almalinux8.x86_64.rpm ; \
+    else dnf -y install https://github.com/wkhtmltopdf/packaging/releases/download/0.12.6.1-2/wkhtmltox-0.12.6.1-2.almalinux8.aarch64.rpm ; \
+    fi
+
+# install Node.js, PostCSS Preset Env and csstools-cli (used to simplify CSS so that it is understood by wkhtmltopdf)
+RUN dnf -y module install nodejs:16
+RUN npm install postcss-preset-env -g
+RUN npm install @csstools/csstools-cli -g
 
 # set environment
 ENV LANG=en_US.utf8