first commit

Dockerfile

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+FROM golang:1.13 AS builder
+
+RUN apt-get update && apt-get -y install upx
+
+ENV GO111MODULE=on CGO_ENABLED=0
+
+COPY . .
+
+RUN go build \
+  -a \
+  -trimpath \
+  -ldflags "-s -w -extldflags '-static'" \
+  -installsuffix cgo \
+  -tags netgo \
+  -o /bin/google-chat-action \
+  .
+
+RUN strip /bin/google-chat-action
+
+RUN upx -q -9 /bin/google-chat-action
+
+FROM scratch
+
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+
+COPY --from=builder /bin/google-chat-action /bin/google-chat-action
+
+ENTRYPOINT ["/bin/google-chat-action"]