How to reslove permission denied while building docker compose

I am trying to build following docker file and then run it but I'm getting this error

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

My docker file is as follows in that trying to build two containers one go and another 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: {}

this my run command

docker compose up -d

And this my dockerfile

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"]

Please let me know if I am doing anything wrong

It seems there is a permission issue when trying to execute the ./doc8 command within the container. You can modify the docker file to ensure the executable has the correct permissions before running it.

MODIFY THIS IN THE DOCKERFILE:

# Add execute permissions to the executable
RUN chmod +x ./doc8

CMD ["./doc8"]