adding armhf build for testing

debian-armhf.docker

@@ -1,6 +1,8 @@
-FROM resin/armv7hf-debian:jessie
+FROM jsurf/rpi-raspbian
 MAINTAINER adam@diginc.us <adam@diginc.us>
 
+RUN [ "cross-build-start" ]
+
 # Requirements
 RUN apt-get -q update && \
     apt-get install -y \
@@ -58,3 +60,5 @@ EXPOSE 80
 
 ENTRYPOINT ["/bash", "-c"]
 CMD /start.sh
+
+RUN [ "cross-build-end" ]  

test/test_000_build_containers.py

@@ -9,6 +9,7 @@ run_local = testinfra.get_backend(
 @pytest.mark.parametrize("image,tag", [
     ( 'alpine.docker', 'diginc/pi-hole:alpine' ),
     ( 'debian.docker', 'diginc/pi-hole:debian' ),
+    ( 'debian-armhf.docker', 'diginc/pi-hole-armhf:debian' ),
 ])
 def test_build_pihole_image(image, tag):
     build_cmd = run_local('docker build -f {} -t {} .'.format(image, tag))