feat(dockerfile): Addition of dockerfile for building Abstruse image

.dockerignore

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+node_modules/*
+dist/*

Dockerfile

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+# Stage 1 image
+FROM mhart/alpine-node:8 as base
+
+LABEL maintainer="Jan Kuri <[email protected]>" \
+      org.label-schema.schema-version="1.0" \
+      org.label-schema.name="abstruse" \
+      org.label-schema.description="Continuous integration platform, simple, scalable and fast" \
+      org.label-schema.url="https://abstruse.bleenco.io/" \
+      org.label-schema.vcs-url="https://github.com/bleenco/abstruse" \
+      org.label-schema.vendor="Bleenco" \
+      org.label-schema.vcs-ref="n/a" \
+      org.label-schema.version="dev"
+
+ENV DOCKER_VERSION=17.09.0-ce
+
+RUN apk --no-cache add openssl \
+    && wget https://download.docker.com/linux/static/stable/x86_64/docker-$DOCKER_VERSION.tgz -O /tmp/docker.tgz \
+    && mkdir /tmp/docker && tar xzf /tmp/docker.tgz -C /tmp \
+    && ln -s /tmp/docker/docker /usr/bin/docker && chmod 755 /usr/bin/docker && rm -rf /tmp/docker.tgz \
+    && apk del openssl
+
+# Stage 2 image
+FROM base as build
+
+WORKDIR /app
+
+COPY package.json package-lock.json tsconfig.json webpack.*.js /app/
+COPY ./src /app/src
+
+RUN apk add --no-cache --virtual .build-dependencies make gcc g++ python curl sqlite git \
+    && npm set progress=false && npm config set depth 0 \
+    && npm i --only=production \
+    && cp -R node_modules prod_node_modules \
+    && npm i && npm run build:prod && ls -lha /usr/lib/node_modules \
+    && apk del .build-dependencies
+
+
+# Stage 3 image
+FROM alpine:3.6
+
+WORKDIR /app
+
+RUN apk --no-cache add tini sqlite git
+
+COPY --from=base /usr/bin/node /usr/bin/
+COPY --from=base /usr/lib/libgcc* /usr/lib/libstdc* /usr/lib/
+COPY --from=base /tmp/docker/docker /usr/bin/docker
+
+COPY --from=build /app/package.json /app/
+COPY --from=build /app/prod_node_modules ./node_modules
+COPY --from=build /app/dist ./dist
+COPY --from=build /app/src/files ./src/files
+
+EXPOSE 6500
+
+ENTRYPOINT ["/sbin/tini", "--"]
+CMD [ "node", "dist/api/index.js" ]