Add docker-compose.yml to be used for compile tests

Ideally this will be expanded in order to simplify compilation tests of
DAHDI on supported distributions.

Signed-off-by: Shaun Ruffell <sruffell@sruffell.net>

test/docker/debiantesting

@@ -0,0 +1,12 @@
+FROM debian:testing
+
+ENV DEBIAN_FRONTEND noninteractive
+
+RUN apt-get update && apt-get install -y \
+      gcc \
+      git \
+      linux-headers-amd64 \
+      make \
+      wget
+
+CMD ["/source/test/test-build.sh"]