Initial attempt at docker compliance tests.

Dockerfile

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+FROM rustlang/rust:nightly-alpine3.10
+
+RUN apk --no-cache add bash git npm nodejs
+
+# Create unprivileged user
+RUN addgroup -S duster && adduser -S duster -G duster
+
+# Install LinkedIn DustJS. Installing it globally before copying in
+# the repo to avoid spamming the npm servers with every codebase
+# change.
+RUN npm install -g dustjs-linkedin
+
+
+# Copy repo into duster user's directory
+RUN mkdir /home/duster/duster
+WORKDIR /home/duster/duster
+COPY . .
+RUN chown -R duster:duster /home/duster/duster
+
+USER duster
+RUN git clean -dfxq
+RUN cargo build