Understanding ECS+ Fargate Source Code Mounting

本We have multi-posted at 3 locations including this site.
https://detail.chiebukuro.yahoo.co.jp/qa/question_detail/q12274662377
https://teratail.com/questions/uuw328n9imd4ci
About mounting source code for ECS+Fargate

I am an ECS beginner.
The goal is to run the LAMP environment currently running on EC2 with ECS+Fargate.

Write the COPY command in the Dockerfile in the configuration below and
When building, I put the source code in a container and then push it to ECS.

COPY./html/var/www/html

docker build-tecs-demo-web./docker/web/

Project
d docker ┃ wweb
┃ br ┠ Dockerfile
┃t html
┃┃ inindex.php
┃ d db
┃ D Dockerfile
d docker-compose.yml

I think it is common to separate the Dockerfile and source code hierarchy as shown below.
(Current applications are also configured below)

Project
d docker ┃ wweb
┃ br ┗ Dockerfile
┃ d db
┃ D Dockerfile
h html ┃ in index.php
d docker-compose.yml

I don't think the COPY command can reference the parent directory, but
Is there a way to load the source code into the Fargate container without using the COPY command?

I would appreciate it if you could reply.Thank you for your cooperation.