fix: add /tmp directory to scratch runtime image#38
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The scratch base image has no /tmp directory, causing "No such file or directory" errors on write operations that use temp files. Create an empty /tmp with sticky bit in the builder and copy to runtime.
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Summary
Scratch base image has no
/tmpdirectory. Write operations that use temp files fail withNo such file or directory (os error 2) at path "/tmp/.tmpXXX".Creates an empty
/tmpwith sticky bit (1777) in the builder stage and copies it to the scratch runtime.