Merge pull request #44 from balena-io-examples/use_base_images_by_arch

Dockerfile: Switch to using base images by arch

Dockerfile.template

@@ -1,7 +1,7 @@
 # base-image for node on any machine using a template variable,
 # see more about dockerfile templates here: https://www.balena.io/docs/learn/develop/dockerfile/#dockerfile-templates
 # and about balena base images here: https://www.balena.io/docs/reference/base-images/base-images/
-FROM balenalib/%%BALENA_MACHINE_NAME%%-node:14-buster-run
+FROM balenalib/%%BALENA_ARCH%%-node:14-buster-run
 
 # use `install_packages` if you need to install dependencies,
 # for instance if you need git, just uncomment the line below.
@@ -20,8 +20,5 @@ RUN JOBS=MAX npm install --production --unsafe-perm && npm cache verify && rm -r
 # This will copy all files in our root to the working directory in the container
 COPY . ./
 
-# Enable udevd so that plugged dynamic hardware devices show up in our container.
-ENV UDEV=1
-
 # server.js will run when container starts up on the device
 CMD ["npm", "start"]