CodePipeline Issue During Deploy Stage - Dockerfile Doesn't Exist or Isn't Within the Dir

Hi there,

CodeBuild specs:

• Platform: Ubuntu
• Runtime: Standard
• Image: aws/codebuild/Standard:7.0

During the final Deploy Stage, I'm receiving the following error:

2024/05/01 14:03:50.450964 [ERROR] An error occurred during execution of command [app-deploy] - [Docker Specific Build Application]. Stop running the command. Error: failed to read Dockerfile: open /var/app/staging/server/backend.Dockerfile: no such file or directory

This is my docker-compose.yml

version: '3.8'

services:
  server:
    image: ************.dkr.ecr.us-east-2.amazonaws.com/howdy-api-production:${IMAGE_TAG:-latest}
    container_name: servername
    platform: linux/amd64
    restart: always
    environment:
      - RDS_USER=${RDS_USER}
      - RDS_PASSWORD=${RDS_PASSWORD}
      - RDS_SERVER=${RDS_SERVER}
      - RDS_PORT=${RDS_PORT}
      - RDS_DB=${RDS_DB}
      - REDIS_PORT=${REDIS_PORT}
      - SECRET_KEY=${SECRET_KEY}
      - SMTP_SENDER_ADDRESS=${SMTP_SENDER_ADDRESS}
      - SENDGRID_API_KEY=${SENDGRID_API_KEY}    
      - AWS_KEY_ID=${AWS_KEY_ID}
      - AWS_SECRET_KEY=${AWS_SECRET_KEY}
    build: 
        context: ./server
        dockerfile: backend.Dockerfile
    volumes:
      - ./server/app/:/app/
      - public_assets:/app/shared/public
    # env_file:
    #   - ./server/.env
    ports:
      - 8000:8000
    networks:
      - howdynetwork

And here's the backend.Dockerfile

FROM python:3.11.1-slim

WORKDIR /app

ENV PYTHONDONTWRITEBYTECODE 1

ENV PYTHONUNBUFFERED 1

COPY ./requirements.txt /app/requirements.txt

RUN pip3 install --no-cache-dir -r /app/requirements.txt

COPY ./app /app/

CMD ["uvicorn","main:app","--host=0.0.0.0","--port=8000","--reload", "--log-level=debug"]

Finally, here's my buildspec.yml

version: 0.2

phases:
    pre_build:
        commands:
            - echo "Logging in to Amazon ECR..."
            - aws ecr get-login-password --region $AWS_DEFAULT_REGION | docker login --username AWS --password-stdin $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com
            - COMMIT_SHA=$(echo $CODEBUILD_RESOLVED_SOURCE_VERSION | cut -c 1-7)
            - IMAGE_TAG=${COMMIT_SHA:-latest}
    build:
       commands:
            - echo "Build started on `date`"
            - cd ./server
            - docker build -f backend.Dockerfile -t $IMAGE_REPOSITORY:$IMAGE_TAG .
            - docker tag $IMAGE_REPOSITORY:$IMAGE_TAG $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com/$IMAGE_REPOSITORY:$IMAGE_TAG
            - cd ..
            - echo "Build completed on `date`"
    post_build:
        commands:
            - echo "Push the docker image to AWS ECR..."
            - docker push $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com/$IMAGE_REPOSITORY:$IMAGE_TAG
            - echo "Update IMAGE_TAG in docker-compose.yml..."
            - sed -i -e "s/\${IMAGE_TAG:-latest}/$IMAGE_TAG/g" docker-compose.yml
artifacts:
    files:
        - .ebextensions/**/*
        - docker-compose.yml
        - nginx.conf
# cache:
#     paths:
#         - node_modules

Here's my project structure:

If I use AWSCLI such as eb deploy ... the deploy is without any problems.

Finally, as a note, I'm following this tutorial https://bentranz.medium.com/setup-continuous-deployment-pipeline-for-aws-elastic-beanstalk-5f8edb38d872