Added license file and copyright notice.

LICENSE.txt

@@ -0,0 +1,15 @@
+ISC License
+
+Copyright (c) Tim Zhang and Contributors
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.

README.md

@@ -3,9 +3,10 @@
 A GitHub Action that verifies commits in pull-request all include Developer Certificate of Origin (DCO) information
 
 ## Usage
+
 Add .github/workflows/sanity-check.yml with the following:
 
-```
+```yaml
 name: Sanity check
 on: [pull_request]
 
@@ -24,3 +25,8 @@ jobs:
       with:
         commits: ${{ steps.get-pr-commits.outputs.commits }}
 ```
+## Copyright and License
+
+Copyright Tim Zhang and Contributors.
+
+ICS license, see [LICENSE.txt](LICENSE.txt) for details.

package.json

@@ -6,7 +6,7 @@
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
   },
-  "author": "",
+  "author": "Tim Zhang <[email protected]>",
   "license": "ISC",
   "dependencies": {
     "@actions/core": "^1.2.3",