Hello Daniel, forking sounds good, probably you should change the docker-compose.yml to point to the docker image that has the changes you want to implement.
You can create an image using a Dockerfile that points to your fork, check the current Dockerfile here https://hub.docker.com/r/rocketchat/rocket.chat/~/dockerfile/ as an example, that uses the url for the official releases (you should change that), are you planning to put the image in dockerhub or just use it for your personal deployment in one of the cloud services? in the last case you can create the image locally adding a folder with the app instead of using curl, you can find an example of that also in the repo under the .docker folder https://github.com/RocketChat/Rocket.Chat/blob/develop/.docker/Dockerfile.
You can also take a look to the circle-ci on how to generate docker images meteor build
and
docker build -t {your image name} -f .docker/Dockerfile {path where you have just the bundle}
I installed development environment on debian and its work fine , my question is how i can deploy rocket chat system on windows server , for example in angular 7 i run ng build --prod to export deployment file ,
anyone can help from where i can start to fix my problem ?