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client1:~/gowebd# cat main.go

package main

import (
        "fmt"
        "log"
        "net/http"
        "os"
)


func main() {
        http.HandleFunc("/", HelloServer)
        fmt.Printf("Starting server at port 8080\n")
        if err := http.ListenAndServe(":8080", nil); err != nil {
                log.Fatal(err)
        }
}

func HelloServer(w http.ResponseWriter, r *http.Request) {
        name, err := os.Hostname()
        if err != nil {
                panic(err)
        }
        fmt.Fprint(w, "Hello world from " + name + "\n")
}

client1:~/gowebd# cat Dockerfile

FROM golang
#FROM golang as builder

WORKDIR /build
COPY main.go .
RUN go mod init gowebd
RUN go build -o /gowebd

#FROM alpine
#COPY --from=builder /gowebd /gowebd

ENTRYPOINT ["/gowebd"]