Add a Dockerfile

Dockerfile

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+FROM node:buster-slim AS builder
+
+RUN apt-get update && apt-get -y install git python3
+# Switch to official images once my PR is merged
+RUN git clone https://github.com/AaronDewes/LndHub.git -b update-dependencies /lndhub
+
+WORKDIR /lndhub
+
+RUN npm i
+
+# Delete git data as it's not needed inside the container
+
+RUN rm -rf .git
+
+FROM node:buster-slim
+
+RUN adduser --disabled-password --uid 1000 --home /lndhub --gecos "" lndhub
+COPY  --from=builder /lndhub /lndhub
+
+RUN mkdir /lndhub/logs && chown -R lndhun:lndhub /lndhub
+
+USER lndhub
+
+ENV PORT=3000
+EXPOSE 3000
+
+CMD cp $LND_CERT_FILE /lndhub/ && cp $LND_ADMIN_MACAROON_FILE /lndhub/ && cd /lndhub && npm start