docs: add license header

.commitlintrc.js

@@ -0,0 +1,36 @@
+/* eslint-disable @typescript-eslint/no-var-requires */
+
+const { execSync } = require("child_process");
+const { readFileSync } = require("fs");
+
+const authorEmail = execSync(`git config --global --get user.email`)
+  .toString("utf-8")
+  .trim();
+const authors = readFileSync("AUTHORS", "utf-8");
+const isAuthor = authors.includes(`<${authorEmail}>`);
+
+const SCOPES = [
+  // for full list of scopes + details see: https://github.com/streetwriters/notesnook-private/blob/master/CONTRIBUTING.md#commit-guidelines
+
+  "mobile",
+  "web",
+  "desktop",
+  "crypto",
+  "editor",
+  "logger",
+  "theme",
+  "core",
+  "config",
+  "ci",
+  "setup",
+  "docs",
+  "refactor"
+];
+
+module.exports = {
+  rules: {
+    "signed-off-by": [isAuthor ? 0 : 2, "always", `Signed-off-by:`],
+    "type-enum": [2, "always", SCOPES],
+    "type-empty": [2, "never"]
+  }
+};