Debug Golang in containers with delve: container_linux.go:380: starting container process caused: exec: "/dlv": stat /dlv: no such file or directory

I am trying to containerize a debug version Golang application of my own with Golang debugging delve build in. Here is how I can debug my Golang application locally , it is a very simple RSS reader. It retrieves data from RSS feed I am interested in.

$on my local terminal$ dlv debug parsedata-xml-fp.go  # launch my app with delve
Type 'help' for list of commands.
(dlv) b main
Command failed: Location "main" ambiguous: main.main, runtime.main…
(dlv) b main.main
Breakpoint 1 set at 0x760252 for main.main() ./parsedata-xml-fp.go:50
(dlv) c
> main.main() ./parsedata-xml-fp.go:50 (hits goroutine(1):1 total:1) (PC: 0x760252)
=>  50: func main() {
    51:         // [decode from response.Body]
    52:         url := "https://foreignpolicy.com/feed/"
    53:
    54:         var URLset Rss
    55:         if xmlBytes, err := getXML(url); err != nil {
(dlv) l
> main.main() ./parsedata-xml-fp.go:50 (hits goroutine(1):1 total:1) (PC: 0x760252)
=>  50: func main() {
    51:         // [decode from response.Body]
    52:         url := "https://foreignpolicy.com/feed/"
    53:
    54:         var URLset Rss
    55:         if xmlBytes, err := getXML(url); err != nil {
(dlv) 

On my local machine I can set breakpoints and step into functions I am interested in.

I was trying to do the same inside a container I built.

Option #1: Below is the Dockerfile of my container

#Dockerfile.dlv
FROM golang:1.17 AS build

WORKDIR /
COPY go/app/parsedata-xml-fp.go .
COPY go.mod .
COPY go.sum .
    
RUN go install github.com/go-delve/delve/cmd/dlv@latest
RUN go build -gcflags="all=-N -l" -o /feedme
RUN echo $(ls /go/bin)

# stage 2 build 
FROM ubuntu:18.04
WORKDIR /

EXPOSE 2345 

COPY --from=build /go/bin/dlv /dlv
COPY --from=build /feedme /feedme
COPY --from=build /parsedata-xml-fp.go /parsedata-xml-fp.go
CMD ["/dlv", "--listen=:2345", "--headless=true", "--api-version=2", "--accept-multiclient", "exec", "/feedme"]

When bootup my container and login , I go the error :

exec: "go": executable file not found in $PATH

Below is the complete log in my containter

sudo docker exec -it b1494552ef1d /bin/sh
# which dlv
# ls
bin   dev  etc     home  lib64  mnt  parsedata-xml-fp.go  root  sbin  sys  usr
boot  dlv  feedme  lib   media  opt  proc                 run   srv   tmp  var
# ./dlv
Delve is a source level debugger for Go programs.
  ......... # dismiss delve help info , just to confirm dlv is installed 

Use "dlv [command] --help" for more information about a command.
# ./dlv debug parsedata-xml-fp.go
exec: "go": executable file not found in $PATH
# which go
# (nothing)

My understanding is ubuntu1804 has no go installed ? Then I tried to use go docker image only

Option #2

Updated Dockerfile as below : use golang:1.17 as base image (Go should be there):

# Dockerfile.localmod
FROM golang:1.17 AS build

WORKDIR /
COPY go/app/parsedata-xml-fp.go .
COPY go.mod .
COPY go.sum .

RUN echo $(which shell)

RUN go install github.com/go-delve/delve/cmd/dlv@latest
RUN go build -gcflags="all=-N -l" -o /feedme
RUN echo $(ls /go/bin)

EXPOSE 2345 
CMD ["/dlv", "--listen=:2345", "--headless=true", "--api-version=2", "--accept-multiclient", "exec", "/feedme"]

This time error occurred right at I boot my container

sudo docker run 734129d1b1a2                     
docker: Error response from daemon: failed to create shim: OCI runtime create failed: container_linux.go:380: starting container process caused: exec: "/dlv": stat /dlv: no such file or directory: unknown.
ERRO[0000] error waiting for container: context canceled

Anyone could suggest what is the right way of intergrate delve into my Go container and debugging it on container terminal exactly as debug locally?