adding a dockerfile

Dockerfile

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+FROM ubuntu:latest
+
+# Install dependencies
+RUN apt-get -y install curl git software-properties-common
+
+# Set bootstrap script environment variables
+ENV FISH_PPA=nightly-master \
+  TRAVIS_OS_NAME=linux TRAVIS_REPO_SLUG=bpinto/oh-my-fish TRAVIS_BRANCH=master
+
+# Cache script folder
+ADD script /src/script
+WORKDIR /src
+
+# Install fish
+RUN ./script/bootstrap.sh
+
+ADD . /src
+
+CMD ["fish", "./script/run-tests.fish", "--verbose"]
+