Just one dockerfile to simplify things a little and reduce repetition

backend/Dockerfile

@@ -0,0 +1,24 @@
+FROM paritytech/ci-linux:production as builder
+
+ARG PROFILE=release
+WORKDIR /app
+
+COPY . .
+
+RUN cargo build --${PROFILE} --bins
+
+# MAIN IMAGE FOR PEOPLE TO PULL --- small one#
+FROM debian:buster-slim
+LABEL maintainer="Parity Technologies"
+LABEL description="Polkadot Telemetry backend shard/core binaries, static build"
+
+ARG PROFILE=release
+WORKDIR /usr/local/bin
+
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY --from=builder /app/target/$PROFILE/telemetry_shard /usr/local/bin
+COPY --from=builder /app/target/$PROFILE/telemetry_core /usr/local/bin
+RUN apt-get -y update && apt-get -y install openssl && apt-get autoremove -y && apt-get clean && rm -rf /var/lib/apt/lists/
+
+EXPOSE 8000
+