change the react port number

[Rocky528]

https://github.com/Rocky528/Data_analyze_website/blob/main/package.json

change the react port number from 80 to 3000.

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[ellipsis-dev[bot]]

:alert: BitBuilder wasn't able to find any files references in the Issue body. :robot:

First, check that you're referencing files correctly. Reference a file by writing the file name between backticks, such as main.py, by using a markdown link, like [main.py](main.py), or by simply copy/pasting the URL from GitHub. For more information and to see examples, check the documentation. Once you've edited the issue description, add the bitbuilder:create label back to this issue. Commenting with more details will not create an implementation plan. You must edit the issue body and add the bitbuilder:create label back on.

If that doesn't work, BitBuilder Junior probably isn't configured to ingest files of the language or framework you're using. Please join our Slack and share the file extensions in the #help-pull-requests channel.