Add docker files for testing deb/rpm repos

test/deb.dockerfile

@@ -0,0 +1,13 @@
+FROM debian:stable
+
+RUN apt-get update \
+    && apt-get upgrade -y \
+    && apt-get dist-upgrade -y \
+    && apt-get install -y sudo gnupg apt-transport-https ca-certificates
+
+RUN sudo apt-key adv --keyserver pool.sks-keyservers.net --recv-keys 379CE192D401AB61 \
+    && echo "deb https://dl.bintray.com/dopplerhq/doppler-deb stable main" | sudo tee -a /etc/apt/sources.list \
+    && sudo apt-get update \
+    && sudo apt-get install -y doppler
+
+ENTRYPOINT doppler --version

test/rpm.dockerfile

@@ -0,0 +1,9 @@
+FROM centos:latest
+
+RUN yum update -y && yum install -y wget sudo
+
+RUN sudo wget https://bintray.com/dopplerhq/doppler-rpm/rpm -O bintray-dopplerhq-doppler-rpm.repo && mv bintray-dopplerhq-doppler-rpm.repo /etc/yum.repos.d/ \
+    && sudo yum update -y \
+    && sudo yum install -y doppler
+
+ENTRYPOINT doppler --version