move dockerfile into codebase

.dockerignore

@@ -0,0 +1,2 @@
+.git
+node-modules/

Dockerfile

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+# This image will be published as dspace/dspace-angular
+# See https://dspace-labs.github.io/DSpace-Docker-Images/ for usage details
+
+FROM node:8
+WORKDIR /app
+ADD . /app/
+EXPOSE 3000
+
+RUN yarn install
+CMD yarn run watch