added a Dockerfile for the automated builds of Docker Hub

Dockerfile.automated

@@ -0,0 +1,45 @@
+FROM resin/armv7hf-debian-qemu AS armBin
+
+
+FROM arm32v7/node:dubnium-alpine as builder
+COPY --from=armBin /usr/bin/cross-build-start /usr/bin/
+COPY --from=armBin /usr/bin/cross-build-end /usr/bin/
+COPY --from=armBin /usr/bin/qemu-arm-static /usr/bin/
+COPY --from=armBin /usr/bin/resin-xbuild /usr/bin/
+RUN [ "cross-build-start" ]
+RUN apk add -U build-base python jq
+WORKDIR /usr/src/app
+COPY . /usr/src/app
+RUN yarn add --force package.json && \
+    yarn build && \
+    yarn remove $(cat package.json | jq -r '.devDependencies | keys | join(" ")')
+RUN [ "cross-build-end" ]
+
+
+FROM arm32v7/node:dubnium-alpine as builder
+LABEL maintainer="[email protected]"
+LABEL maintainer="[email protected]"
+
+ENV PORT=3000
+ENV SSHHOST=localhost
+ENV SSHPORT=22
+
+WORKDIR /usr/src/app
+ENV NODE_ENV=production
+EXPOSE $PORT
+COPY --from=builder /usr/src/app/dist /usr/src/app/dist
+COPY --from=builder /usr/src/app/node_modules /usr/src/app/node_modules
+COPY package.json /usr/src/app
+COPY index.js /usr/src/app
+
+COPY --from=armBin /usr/bin/cross-build-start /usr/bin/
+COPY --from=armBin /usr/bin/cross-build-end /usr/bin/
+COPY --from=armBin /usr/bin/qemu-arm-static /usr/bin/
+COPY --from=armBin /usr/bin/resin-xbuild /usr/bin/
+RUN [ "cross-build-start" ]
+RUN apk add -U openssh-client sshpass && \
+    mkdir ~/.ssh && \
+    ssh-keyscan -H wetty-ssh >> ~/.ssh/known_hosts
+RUN [ "cross-build-end" ]
+
+ENTRYPOINT [ "node", "." ]