add clarification of what legal effect --signoff is supposed to even have

Fix: #106

Signed-off-by: d3fault <[email protected]>

Author: d3fault

index.js

@@ -168,9 +168,9 @@ module.exports = ({ app }) => {
 }
 
 function handleOneCommit (pr, dcoFailed) {
-  return `You only have one commit incorrectly signed off! To fix, first ensure you have a local copy of your branch by [checking out the pull request locally via command line](https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/checking-out-pull-requests-locally). Next, head to your local branch and run: \n\`\`\`bash\ngit commit --amend --no-edit --signoff\n\`\`\`\nNow your commits will have your sign off. Next run \n\`\`\`bash\ngit push --force-with-lease origin ${pr.head.ref}\n\`\`\``
+  return `You only have one commit incorrectly signed off! Signing off the commit certifies that the committer has the rights to submit this work under this project's license and agrees to the [Developer Certificate of Origin](https://developercertificate.org), either version 1.1 of the Developer Certificate of Origin, or (at your option) any later version. To fix, first ensure you have a local copy of your branch by [checking out the pull request locally via command line](https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/checking-out-pull-requests-locally). Next, head to your local branch and run: \n\`\`\`bash\ngit commit --amend --no-edit --signoff\n\`\`\`\nNow your commits will have your sign off. Next run \n\`\`\`bash\ngit push --force-with-lease origin ${pr.head.ref}\n\`\`\``
 }
 
 function handleMultipleCommits (pr, commitLength, dcoFailed) {
-  return `You have ${dcoFailed.length} commits incorrectly signed off. To fix, first ensure you have a local copy of your branch by [checking out the pull request locally via command line](https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/checking-out-pull-requests-locally). Next, head to your local branch and run: \n\`\`\`bash\ngit rebase HEAD~${commitLength} --signoff\n\`\`\`\n Now your commits will have your sign off. Next run \n\`\`\`bash\ngit push --force-with-lease origin ${pr.head.ref}\n\`\`\``
+  return `You have ${dcoFailed.length} commits incorrectly signed off. Signing off the commit certifies that the committer has the rights to submit this work under this project's license and agrees to the [Developer Certificate of Origin](https://developercertificate.org), either version 1.1 of the Developer Certificate of Origin, or (at your option) any later version. To fix, first ensure you have a local copy of your branch by [checking out the pull request locally via command line](https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/checking-out-pull-requests-locally). Next, head to your local branch and run: \n\`\`\`bash\ngit rebase HEAD~${commitLength} --signoff\n\`\`\`\n Now your commits will have your sign off. Next run \n\`\`\`bash\ngit push --force-with-lease origin ${pr.head.ref}\n\`\`\``
 }