Add arm32v7 docker.

.dockerignore

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+node_modules

Dockerfile-arm32v7

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+FROM arm32v7/node
+
+# Copy files
+ADD . /app
+RUN cp /app/data/configuration.yaml /app
+
+# Create startup script.
+RUN echo '#!/bin/bash\n\
+cp -n /app/configuration.yaml /app/data/configuration.yaml\n\
+npm start\n'\
+>> /app/start.sh
+RUN chmod +x /app/start.sh
+
+WORKDIR /app
+RUN npm install
+ENTRYPOINT ["./start.sh"]