This site is built by CircleCI and uploaded to S3 on each new commit to the beta or www branches.
The beta branch is the default branch, so changes made there are automatically deployed to https://beta.thewallsproject.org.
The www branch is deployed to https://www.thewallsproject.org.
To move changes on beta to www, first click this link.
Then, click "Create Pull Request".
After creating creating the pull request, scroll down and find the "Merge Pull Request" button and click that.