A toy webserver with variable expansion based on connecting client

Dockerfile

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+FROM golang:alpine AS builder
+WORKDIR /build
+COPY go.mod go.sum ./
+RUN go mod download
+COPY main.go ./
+RUN CGO_ENABLED=0 GOOS=linux go build -o clab-webserver .
+
+FROM alpine:latest
+RUN apk add --no-cache ca-certificates tzdata
+WORKDIR /app
+COPY --from=builder /build/clab-webserver .
+COPY docroot/ docroot/
+EXPOSE 80
+ENTRYPOINT ["/app/clab-webserver"]
+CMD ["-listen", ":80"]