start work on dockerfile

Signed-off-by: Ben Yanke <ben@benyanke.com>

Dockerfile

@@ -0,0 +1,40 @@
+FROM python:3 as base
+
+MAINTAINER Ben Yanke <benyanke@gmail.com>
+
+##############
+# Main setup stage
+##############
+
+# Copy in deps first, to improve build caching
+COPY requirements.txt /app-src/requirements.txt
+WORKDIR /app-src
+
+# Get kerberos deps before pip deps can be fetched
+#RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -qq -y krb5-user -y && rm -rf /var/lib/apt/lists/*
+
+# Get latest pip and dependencies
+RUN /usr/local/bin/python3 -m pip install --upgrade pip && pip install -r requirements.txt
+
+# Copy in rest of the code after deps are in place
+COPY . /app-src
+
+# Install the app
+RUN /usr/local/bin/python3 setup.py install
+
+##############
+# Run tests in a throwaway stage
+# if tests are added later, run them here
+##############
+#FROM base as test
+#WORKDIR /app-src
+#RUN /usr/local/bin/python3 setup.py test
+
+##############
+# Throw away the test stage, revert back to base stage before push
+##############
+
+FROM base
+WORKDIR /root
+CMD ["/usr/local/bin/offlineimap"]
+# reads from /root/.offlineimaprc by default - mount this in for running

README.md

@@ -67,6 +67,8 @@ If you are running Linux, you can install offlineimap with:
 -  openSUSE `zypper in offlineimap`
 -  fedora `dnf install offlineimap`
 -  Arch Linux: through AUR package [offlineimap3-git](https://aur.archlinux.org/packages/offlineimap3-git/)
+-  Docker image: `offlineimap/offlineimap:latest` 
+ (note: image not published yet, just an example)
 
 ## Feedbacks and contributions