Add guide to copy file source connector to container (#12978)
Add guide to copy file source connector to container (#12978)

* Add guide to copy file source connector to container

Added instruction to copy file source connector into docker image. 
Adjusted numbers accordingly

* spelling correction

* added restart command and sentence suggestion

* Update site2/docs/io-file-source.md

Co-authored-by: Anonymitaet <aec7d063be84bc289e6d466598c8e26d10c73dc9@users.noreply.github.com>

Co-authored-by: Anonymitaet <aec7d063be84bc289e6d466598c8e26d10c73dc9@users.noreply.github.com>
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