Merge pull request #377 from michielbdejong/docker

feat(docker): Additional Dockerfile for self-hosting r=vladikoff

.dockerignore

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+.git

docs/self-host.docker

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+FROM vladikoff/fxa-slim-image:1.0.0
+
+RUN adduser --disabled-password --gecos '' fxa && adduser fxa sudo && echo '%sudo ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers
+
+COPY . /home/fxa/fxa-oauth-server
+WORKDIR /home/fxa/fxa-oauth-server
+RUN chown -R fxa .
+USER fxa
+
+RUN npm install --production \
+  && npm cache clear
+ENV NODE_ENV prod
+CMD ./node_modules/.bin/grunt server --node-env=prod
+
+# Expose ports
+EXPOSE 9010
+EXPOSE 9011