build multi-platform without Python2

Dockerfile

@@ -1,22 +1,24 @@
-FROM sitespeedio/node:ubuntu-20.04-nodejs-12.16.2
+FROM sitespeedio/node:ubuntu-20.04-nodejs-14.16.0
+
+ARG TARGETPLATFORM
 
 # Lets install all dependencies for VisualMetrics
-RUN buildDeps='wget ca-certificates' && \
+RUN export BUILD=$(if [ "$TARGETPLATFORM" = "linux/amd64" ] ; then echo "amd64"; else echo "arm64"; fi) \
+  buildDeps='wget ca-certificates' && \
   apt-get update -y && apt-get install -y \
   imagemagick \
   libjpeg-dev \
-  python2 \
-  python2-dev \
+  python3 \
+  python3-dev \
+  python3-pip \
+  python-is-python3 \
   xz-utils \
   $buildDeps \
   --no-install-recommends --force-yes && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* && \
-  wget https://bootstrap.pypa.io/get-pip.py && \
-  python2 get-pip.py && \
-  python2 -m pip install --upgrade pip && \
-  python2 -m pip install --upgrade setuptools && \
-  python2 -m pip install pyssim && \
-  update-alternatives --install /usr/bin/python python /usr/bin/python2 1 && \
-  wget https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-amd64-static.tar.xz && \
-  tar --strip-components 1 -C /usr/bin -xf ffmpeg-release-amd64-static.tar.xz --wildcards */ffmpeg && \
-  rm ffmpeg-release-amd64-static.tar.xz && \
+  python -m pip install --upgrade pip && \
+  python -m pip install --upgrade setuptools && \
+  python -m pip install pyssim pyssim Pillow image && \
+  wget https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-$BUILD-static.tar.xz && \
+  tar --strip-components 1 -C /usr/bin -xf ffmpeg-release-$BUILD-static.tar.xz --wildcards */ffmpeg && \
+  rm ffmpeg-release-$BUILD-static.tar.xz && \
   apt-get purge -y --auto-remove $buildDeps

README.md

@@ -1,2 +1,7 @@
 # Docker VisualMetrics dependencies
 Adds the dependencies needed by [VisualMetrics](https://github.com/WPO-Foundation/visualmetrics) to sitespeed.io [base container](https://github.com/sitespeedio/docker-node).
+
+
+```
+docker buildx build --push --platform linux/arm64,linux/amd64 -t sitespeedio/visualmetrics-deps:ffmpeg-4.2.2-imagemagick-6.9.10-23-p2-c .
+```