docs: change introduction in readem
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-Provide efficient, stable, secure, low-cost file and
-image distribution services to be the best practice and
+Provide efficient, stable and secure file distribution and image acceleration
+based on p2p technology to be the best practice and
standard solution in cloud native architectures.
## Introduction
-Dragonfly is an open source P2P-based file and
-image distribution system. It is hosted by the
+Dragonfly is an open source P2P-based file distribution and
+image acceleration system. It is hosted by the
Cloud Native Computing Foundation ([CNCF](https://cncf.io/)) as
an Incubating Level Project.
Its goal is to tackle all distribution problems in cloud native architectures.
