Go 如何解决构建Docker Compose时的权限被拒绝问题

我正在try 构建以下docker文件，然后运行它，但我收到此错误

Error response from daemon: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: exec: "./doc8": permission denied: unknown

我的docker文件如下所示:try 构建两个容器，一个是go，另一个是id postgreSQL:

version: '3.7'
services:
  postgre-db:
    container_name: postgre-db
    image: postgres:12.2-alpine
    environment:
      POSTGRES_PASSWORD: postgres
      POSTGRES_USER: postgres
      POSTGRES_DB: postgres
    ports:
      - "5432:5432"
    volumes:
      - pgdata:/var/lib/postgresql/data
  doc8server:
    container_name: doc8server
    image: {IMAGE_NAME}
    env_file:
      - doc8.env
    build:
      context: .
      dockerfile: Dockerfile.doc8server.multistage
    ports:
      - "{PORT}:{PORT}"
    volumes:
      - doc8data:/opt/app/assets/pdfs
      - doc8data:/opt/app/assets/pdfs/originalFiles
    depends_on:
      - postgre-db
volumes:  
  pgdata: {}
  doc8data: {}

这是我的运行命令

docker compose up -d

这是我的文件

FROM golang:latest as builder

LABEL maintainer="Doc8 <example@gmail.com>"

WORKDIR /app/invos_server_golang

COPY go.mod go.sum ./

RUN go mod download

COPY . .

WORKDIR /app/invos_server_golang

RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o doc8 .

FROM rastasheep/ubuntu-sshd:latest

WORKDIR /opt/app

COPY --from=builder /app/invos_server_golang/doc8 .
COPY --from=builder /app/invos_server_golang/doc8.env .

EXPOSE {PORT}

CMD ["./doc8"]

如果我做错了什么，请让我知道