I found this hard to understand, but am not sure how to reword it: "Docker will rebuild everything from the first detected change in a dockerfile but pull everything upstream of that from cache. This means that if you are pulling in external data using RUN and a command like git clone or wget changes in those sources will not automatically be reflected in a rebuilt Docker image unless the Docker file changes at or before that import."
I found this hard to understand, but am not sure how to reword it: "Docker will rebuild everything from the first detected change in a dockerfile but pull everything upstream of that from cache. This means that if you are pulling in external data using RUN and a command like
git cloneorwgetchanges in those sources will not automatically be reflected in a rebuilt Docker image unless the Docker file changes at or before that import."