added support for testing in docker

docker/Dockerfile

@@ -0,0 +1,17 @@
+FROM alpine:3.7
+
+ADD https://openpdu.github.io/alpine/devel@openpdu.org-5a7816cb.rsa.pub /etc/apk/keys
+
+RUN echo "https://openpdu.github.io/alpine/v3.7/main" >> /etc/apk/repositories && \
+    apk --no-cache -U upgrade && \
+    apk --no-cache -U add acf-openpdu alpine-base && \
+    echo root:root | chpasswd && \
+    setup-acf
+
+#ADD start.sh /
+
+EXPOSE 443
+
+#ENTRYPOINT ["/bin/sh"]
+ENTRYPOINT ["/usr/sbin/mini_httpd","-D","-C","/etc/mini_httpd/mini_httpd.conf"]
+