images: Add metalk8s-alert-logger container image

This container image is used for alert history.

Refs: #3180

images/metalk8s-alert-logger/Dockerfile

@@ -0,0 +1,26 @@
+FROM golang:1.16.0-alpine AS builder
+
+ENV CGO_ENABLED=0
+
+ARG ALERTMANAGER_VERSION=latest
+ARG PKG_PATH=/go/src/metalk8s-alert-logger/
+
+RUN mkdir -p "$PKG_PATH"
+
+COPY main.go go.mod "$PKG_PATH"
+
+WORKDIR "$PKG_PATH"
+
+RUN sed -i "s/@@ALERTMANAGER_VERSION@@/$ALERTMANAGER_VERSION/g" go.mod \
+  && go mod tidy \
+  && go install
+
+FROM alpine:3.13.2
+
+MAINTAINER moonshot-platform <[email protected]>
+
+COPY --from=builder /go/bin/ /usr/bin/
+
+EXPOSE 19094
+
+ENTRYPOINT ["metalk8s-alert-logger"]