discovery: Recognize .mjs/.cjs for Node.js (DataDog#31477)

Co-authored-by: Guy Arbitman <[email protected]>

pkg/collector/corechecks/servicediscovery/usm/nodejs.go

@@ -25,8 +25,9 @@ func newNodeDetector(ctx DetectionContext) detector {
 	return &nodeDetector{ctx: ctx}
 }
 
-func isJs(path string) bool {
-	return strings.HasSuffix(strings.ToLower(path), ".js")
+func isJs(filepath string) bool {
+	ext := strings.ToLower(path.Ext(filepath))
+	return ext == ".js" || ext == ".mjs" || ext == ".cjs"
 }
 
 func (n nodeDetector) detect(args []string) (ServiceMetadata, bool) {

pkg/collector/corechecks/servicediscovery/usm/service_test.go

@@ -252,6 +252,26 @@ func TestExtractServiceMetadata(t *testing.T) {
 			expectedGeneratedName: "my-awesome-package",
 			fs:                    &subUsmTestData,
 		},
+		{
+			name: "nodejs .cjs with a valid package.json",
+			cmdline: []string{
+				"/usr/bin/node",
+				"./testdata/foo.cjs",
+			},
+			lang:                  language.Node,
+			expectedGeneratedName: "my-awesome-package",
+			fs:                    &subUsmTestData,
+		},
+		{
+			name: "nodejs .mjs with a valid package.json",
+			cmdline: []string{
+				"/usr/bin/node",
+				"./testdata/bar.mjs",
+			},
+			lang:                  language.Node,
+			expectedGeneratedName: "my-awesome-package",
+			fs:                    &subUsmTestData,
+		},
 		{
 			name: "node js with a symlink to a .js file and valid package.json",
 			cmdline: []string{