Deploy Golang with LaunchFlow

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mkdir launchflow-go
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cd launchflow-go
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go mod init launchflow-go
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package main
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import (
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    "fmt"
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    "log"
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    "net/http"
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    "os"
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)
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func main() {
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    lfEnv := os.Getenv("LAUNCHFLOW_ENVIRONMENT")
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    if lfEnv == "" {
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        log.Fatal("LaunchFlow environment not set")
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    }
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    port := os.Getenv("PORT")
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    if port == "" {
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        port = "3000"
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    }
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    host := os.Getenv("HOST")
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    if host == "" {
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        host = "127.0.0.1"
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    }
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    address := fmt.Sprintf("%s:%s", host, port)
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    greeting := fmt.Sprintf("Hello from %s!", lfEnv)
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    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
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        fmt.Fprint(w, greeting)
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    })
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    log.Printf("Server listening on %s", address)
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    log.Fatal(http.ListenAndServe(address, nil))
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}
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FROM public.ecr.aws/docker/library/golang:1.20 as builder
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WORKDIR /app
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COPY . .
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RUN CGO_ENABLED=0 GOOS=linux go build -o /go/bin/app
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FROM public.ecr.aws/docker/library/alpine:3.14
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COPY --from=builder /go/bin/app /go/bin/app
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ENV HOST=0.0.0.0
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ENV PORT=80
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ENTRYPOINT ["/go/bin/app"]
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