update comments, add helper script to push local build to rpi

tests/build_arm.sh

@@ -2,10 +2,16 @@
 
 ALPINE_VER="3.8"
 DISTRO="balenalib/rpi-alpine:$ALPINE_VER"
+# Used for Radicale
 EDGE_DISTRO="balenalib/rpi-alpine:edge"
+# Used for webmails
 PHP="arm32v7/php:7.2-apache"
+
+# NOTE: Might not be needed since using multiarch/qemu
 QEMU="$(which qemu-arm-static)"
 cp $QEMU ../webmails/rainloop/
 cp $QEMU ../webmails/roundcube/
 
+# use qemu-*-static from docker container
+docker run --rm --privileged multiarch/qemu-user-static:register 
 docker-compose -f build.yml build --build-arg DISTRO=$DISTRO --build-arg PHP_DISTRO=$PHP --build-arg EDGE_DISTRO=$EDGE_DISTRO --parallel $@

tests/deploy_to_pi.sh

@@ -0,0 +1,6 @@
+#!/bin/bash -x
+# Small script to deploy locally built images to a remote docker
+compose_options=$1
+images=$(docker-compose $1 images  | awk 'NR > 2 { printf $2":"$3" " }')
+docker save $images | pigz  - > mail.local.tgz
+echo "now run 'docker -H \"ssh://user@host\" load -i mail.local.tgz"