Add new repository in bitbucket

 Assuming you have Git installed on your local machine, then:

1. Locally, change to the root directory of your existing source.

2. Initialize the project by running the following commands in the terminal:

   git init
   git add --all
   git commit -m "Initial Commit"

3. Log into Bitbucket and create a new repository.
4. Locate the clone URL in the nav panel on the left (for example:  https://username@your.bitbucket.domain:7999 /yourproject/repo.git).

5. Push your files to the repository by running the following commands in the terminal (change the URL accordingly):

   git remote add origin https://username@your.bitbucket.domain:7999/yourproject/repo.git 
   git push -u origin master

6. Done! Your repository is now available in Bitbucket.

Ref: https://confluence.atlassian.com/bitbucketserver/importing-code-from-an-existing-project-776640909.html