Tip: Sending build context to Docker daemon when Docker build

Symptom:

  When we run docker build

Sending build context to Docker daemon...

   After a while, we hit out of space issue.

Solution:

When docker build large image like oracle database, we better only keep only 1 version DB downloaded binary file in the docker build directory. 
By default docker daemon sending build context will include all the zip files in it (include unused version zip files), it may cause unnecessary space pressure.