Co-authored-by: Marcus Schiesser <mail@marcusschiesser.de>

This reverts commit 979b7dd6.

* feat: allow custom external port

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Co-authored-by: thucpn <thucsh2@gmail.com>

* feat: add selection for vector DB
* feat: add mongo datasource 
* fix: remove not implemented vector dbs

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Co-authored-by: Thuc Pham <51660321+thucpn@users.noreply.github.com>

add license
make contextchatengine the default
change git commit message