diff --git a/.gitignore b/.gitignore
new file mode 100644
index 00000000..a56a7ef4
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+node_modules
+
diff --git a/.mapping.json b/.mapping.json
index bd251ac5..6de71d30 100644
--- a/.mapping.json
+++ b/.mapping.json
@@ -3,6 +3,7 @@
   ".gitattributes":"perforator/opensource/github_toplevel/.gitattributes",
   ".github/workflows/postcommit.yaml":"perforator/opensource/github_toplevel/.github/workflows/postcommit.yaml",
   ".github/workflows/release.yaml":"perforator/opensource/github_toplevel/.github/workflows/release.yaml",
+  ".gitignore":"perforator/opensource/github_toplevel/.gitignore",
   "CONTRIBUTING.md":"perforator/opensource/github_toplevel/CONTRIBUTING.md",
   "LICENSE":"perforator/opensource/github_toplevel/LICENSE",
   "README.md":"perforator/opensource/github_toplevel/README.md",