first commit

Dockerfile

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+FROM golang:1.23 AS build
+
+WORKDIR /build
+
+ENV CGO_ENABLED 0
+
+COPY . .
+
+RUN go build -ldflags "-w -s" -o checker main.go
+
+FROM alpine:3.20.1 AS run
+COPY --from=build /build/checker /bin/checker
+
+CMD checker