Dockerfile : not able to use add to map local file to container

Question

I am trying to build an ejabberd container and trying to add 2 files from my build directory while creating the container.

add ./scripts/ /src

However, I keep getting the error: ./scripts folder does not exist

I am new to docker and was hoping for some help.

Thanks, Arup

Answer 1

The correct syntax for using ADD in Dockerfile is:

ADD <source> <destination>

And ADD has to be in Capital Letters and <source>must be the path to a file or directory relative to the source directory being built (also called the context of the build). So if I wanted to add a file, say "localfile.ext" into a destination folder called "scripts" in the containers, my code in the Dockerfile would be like this:

RUN mkdir /scripts
ADD localfile.ext /scripts/

The trailing / in /scripts/ tells Docker to treat it as a folder else without that /scripts will be treated as a file.

Hope it Helps.