Adding docker for a quickstart option.

Dockerfile

@@ -0,0 +1,16 @@
+FROM ubuntu:bionic
+
+COPY . /root
+
+RUN apt-get update
+RUN apt-get install -y git locales \
+		&& rm -rf /var/lib/apt/lists/*
+
+RUN echo "LC_ALL=en_US.UTF-8" >> /etc/environment \
+ && echo "en_US.UTF-8 UTF-8" >> /etc/locale.gen \
+ && echo "LANG=en_US.UTF-8" > /etc/locale.conf \
+ && locale-gen en_US.UTF-8
+
+WORKDIR /app
+
+ENTRYPOINT bash /root/gh-jack $@

README.md

@@ -23,6 +23,15 @@ Features
 - define the template position relatively (left, center,...) or absolutely (start date)
 - write the message into a repository file for each commit
 
+Quickstart
+----------
+Build the docker container.
+
+    docker build -t ghjack .
+
+Run the docker container from the directory you want your commits to be. A new repo will be initialized for you if one does not exist.
+
+    docker run -it --rm -v $(pwd):/app -v $HOME/.gitconfig:/root/.gitconfig ghjack -f -v
 
 Usage
 -----