Build amd64 and arm64 image

Signed-off-by: Stefan Scherer <stefan.scherer@docker.com>

Dockerfile

@@ -7,6 +7,7 @@ RUN pip install -r requirements.txt
 
 # Run tests to validate app
 FROM node:12-alpine AS app-base
+RUN apk add --no-cache python g++ make
 WORKDIR /app
 COPY app/package.json app/yarn.lock ./
 RUN yarn install