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After the completion of Sealights scanning and/or instrumentation command, the source map files are not required anymore from Sealights' point of view. In order to avoid publishing those files in your production environments and/or optimize the size of the deployed folder, you can delete them.
For example, you can use the following Linux command to find and delete all the files before packing and deploying:
Linux:
find . -name "*.js.map" -exec rm {} \;Windows command prompt:
del /s **\*dist\*.js.map