Add initial docker file for quick goldilocks testing

Dockerfile

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+# This is for alpine base
+FROM node:alpine
+RUN apk update
+RUN apk upgrade
+RUN apk add curl git libcap htop
+
+# This for ubuntu base
+# FROM node
+# RUN apt-get update
+# RUN apt-get dist-upgrade -y
+# RUN apt-get install curl git libcap2 htop -y
+
+# Allow node to listen on ports 80 and 443 as normal user.
+RUN setcap cap_net_bind_service=+ep $(readlink -f $(which node))
+
+WORKDIR /opt/goldilocks
+
+# Copy in just package.json and install npm dependencies first
+COPY package.json /opt/goldilocks/
+RUN yarn install
+
+# Then copy in the rest and link as global binary
+COPY . /opt/goldilocks/
+RUN yarn link
+
+# Copy in a goldilocks config to test it.
+# TODO: pull this from the user somehow
+COPY etc/goldilocks/goldilocks.example.yml /opt/goldilocks/etc/goldilocks/goldilocks.yml
+
+# Run as unpriviledged user
+USER node
+EXPOSE 80 443 5353
+CMD ["/usr/local/bin/goldilocks"]

Makefile

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+run: build
+	docker run --rm --net=host -d --name goldilocks daplie/goldilocks
+logs:
+	docker logs goldilocks -f
+build:
+	docker build . --tag daplie/goldilocks
+rebuild:
+	docker build . --no-cache --tag daplie/goldilocks
+shell:
+	docker exec -ti goldilocks ash
+htop:
+	docker exec -ti goldilocks htop
+kill:
+	docker kill goldilocks || true
+clean: kill
+	docker rm -f goldilocks || true
+	docker rmi -f daplie/goldilocks || true