无法在Docker中构建Golang应用

Question

I have made a golang app using sample example, however when I setup docker to build and run it it fails to build giving the error

ERROR: for goserver  Cannot start service goserver: b'OCI runtime create failed: container_linux.go:348: starting container process caused "exec: \\"./app\\": stat ./app: no such file or directory": unknown'

My Dockerfile is

FROM golang:1.8
WORKDIR /usr/src/app
COPY . .
RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix nocgo -o ./app .
ENTRYPOINT ["./app"]

and my docker-compose is

version: '2'

volumes:
 app_nm:
 driver: local

services:
 goserver:
  container_name: "goserver"
  image: "mygoserver"
  build:
   context: ./First
   dockerfile: Dockerfile
  volumes:
   - ./First:/usr/src/app
  ports:
   - 8081:8080
  tty: true

I tried logging into container via docker exec by setting tty: true and executing the build command and it works fine. What could be the issue?

Answer 1

What looks off to me is that you are setting the working directory to /usr/src/app but then you are running go build ./app. Try changing ./app to just .