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COPY/ADD statement requires 2 parameters. How can I add any file to current workdir that has been set in base image?
FROM company/app
COPY local.conf
Sure I can add WORKDIR statement before COPY to explicitly declare it. But that would be problematic if the workdir in company/app changes.
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COPY COMMAND ADD COMMAND. COPY is a docker file command that copies files from a local source location to a destination in the Docker container. ADD command is used to copy files/directories into a Docker image.
WORKDIR instruction is used to set the working directory for all the subsequent Dockerfile instructions. Some frequently used instructions in a Dockerfile are RUN, ADD, CMD, ENTRYPOINT, and COPY. If the WORKDIR is not manually created, it gets created automatically during the processing of the instructions.
The ADD command is used to copy files/directories into a Docker image. It can copy data in three ways: Copy files from the local storage to a destination in the Docker image. Copy a tarball from the local storage and extract it automatically inside a destination in the Docker image.
It turns out to be very simple. I just need to use dot to copy to current workdir.
COPY local.conf .
Still cannot figure out if this has some gotchas. But it just work as intended.
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