Reading this Dockerfile .  line 26:$(<.node_version.txt) in node-$(<.node_version.txt)-linux-x64.tar.gz The location of .node_version.txt is  appDir/.meteor/local/build/.node_version.txt and the Dockerfile is located in appDir/DockerfileSo, does that mean I need to change the command to:  'curl https://nodejs.org/dist/$(<.meteor/local/build/.node_version.txt)/node-$(<.meteor/local/build/.node_version.txt)-linux-x64.tar.gz > /home/meteorapp/meteorapp/build/required-node-linux-x64.tar.gz' \
Resolve path to file in curl command
docker