Add some test dockerfiles for convenient local testing

Dockerfile

@@ -0,0 +1,17 @@
+FROM centos:7
+
+# RUN apt-get update && apt-get install -y python-flask python-rosinstall-generator python-vcstools python-ros-buildfarm
+RUN yum -y update 
+RUN yum -y install python3-pip git mercurial subversion && yum clean all
+RUN pip3 install -U Flask ros_buildfarm rosinstall_generator vcstools
+
+COPY . /app
+
+WORKDIR /app
+
+# Set the locale Click will complain otherwise
+ENV LANG en_US.UTF-8  
+ENV LANGUAGE en_US:en  
+ENV LC_ALL en_US.UTF-8 
+
+CMD PYTHONPATH=/app FLASK_DEBUG=1 FLASK_APP=prerelease_website python3 -m flask run

Dockerfile.ubuntu

@@ -0,0 +1,9 @@
+FROM ros:melodic
+
+RUN apt-get update && apt-get install -y python-flask python-rosinstall-generator python-vcstools python-ros-buildfarm
+
+COPY . /app
+
+WORKDIR /app
+
+CMD PYTHONPATH=/app FLASK_DEBUG=1 FLASK_APP=prerelease_website python -m flask run