What about trying to add files to your container that are not hosted locally and/or due to licensing you cannot include them in your repository where the Dockerfile lives? For this specific purpose, there is the ADD directive. This command downloads the file from the URI provided and puts it in the container. If the file is local compressed archive, such as a .tgz or a .zip file and the target path ends with a slash, it will get expanded into that directory, making this a very useful option as opposed to COPY. In the example that we're writing here, we will take a semi-random file from GitHub and put it in the directory to be included with the following:

ADD https://raw.githubusercontent.com/moby/moby/master/README.md 
 $SRV_PATH/