adding docker

Dockerfile

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+FROM einstore/swift:5.1-bionic as builder
+
+WORKDIR /app
+COPY . /app
+
+ARG CONFIGURATION="release"
+
+RUN swift build --configuration ${CONFIGURATION} --product systemator
+
+# ------------------------------------------------------------------------------
+
+FROM einstore/swift:5.1-bionic
+
+ARG CONFIGURATION="release"
+
+WORKDIR /app
+COPY --from=builder /app/.build/${CONFIGURATION}/systemator /app
+
+EXPOSE 8080
+
+ENTRYPOINT ["/app/systemator"]
+CMD ["serve", "--hostname", "0.0.0.0", "--port", "8080"]

Makefile

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+REPO = einstore
+IMAGE = systemator
+TAG = 2.1
+
+DEBUG_TAG = local-dev
+
+help:  ## Display this help
+	@awk 'BEGIN {FS = ":.*##"; printf "\nUsage:\n  make \033[36m<target>\033[0m\n\nTargets:\n"} /^[a-zA-Z_-]+:.*?##/ { printf "  \033[36m%-13s\033[0m %s\n", $$1, $$2 }' $(MAKEFILE_LIST)
+
+run: debug  ## Build & run local dev
+	docker run -p 8080:8080 $(REPO)/$(IMAGE):$(DEBUG_TAG)
+
+debug:  ## Build docker image in debug mode
+	docker build --build-arg CONFIGURATION="debug" -t $(REPO)/$(IMAGE):$(DEBUG_TAG) .
+
+build:  ## Release build
+	docker build -t $(REPO)/$(IMAGE):$(TAG) .
+
+publish: build  ## Publish on docker hub
+	docker tag $(REPO)/$(IMAGE):$(TAG) $(REPO)/$(IMAGE):latest
+	docker push $(REPO)/$(IMAGE):$(TAG)
+	docker push $(REPO)/$(IMAGE):latest