Broken URL for slack in footer

[khanjasir90]

Thank you for taking the time to file a Bug report.

Describe the bug

• Icon for slack in footer section contains broken links to slack invitation.

To Reproduce Steps to reproduce the behavior:

• Start the application using yarn start command.
• Go to localhost:3000 and scroll down to footer section and click on the slack icon.

Expected behavior A clear and concise description of what you expected to happen.

• On click of slack icon it should open the slack invitation for the codeisscience community.

[khanjasir90]

can i work on this.