File exit.patch of Package local-npm-registry

diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
new file mode 100644
index 0000000..7b75470
--- /dev/null
+++ b/.github/workflows/tests.yaml
@@ -0,0 +1,18 @@
+name: Unit tests
+on: [push, pull_request]
+jobs:
+  containers-tests-job:
+    runs-on: ubuntu:latest
+    container:
+      image: registry.opensuse.org/opensuse/bci/nodejs:latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install deps and run unit tests
+        run: |
+          echo "Job started by ${{ github.event_name }}"
+          echo "Running on ${{ runner.os }}"
+          echo "Sources checked out"
+          echo "Fetching deps"
+          npm ci
+          npm run test
+
diff --git a/src/index.ts b/src/index.ts
index 0a369cc..dc699df 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -100,28 +100,36 @@ function runNpmInstall(): Promise<void> {
 function printHelpInformation() {
 	console.log("   usage: index [ npm files | npm tarball directories ] ... [npm run options] ");
 	console.log("--help    prints this help message");
+	console.log("--debug   starts service and listens on localhost until killed")
 }
 
-function mainEntryFunction(): Promise<void> {
+function mainEntryFunction(): Promise<any> {
 	if (argv.includes("--help")) {
 		printHelpInformation();
 		return;
 	}
 
+	const isDebug = argv.includes("--debug")
+
 	const registry = new Registry();
 	registry.addBackend(new TarballRegistryBackend);
 	registry.addBackend(new DirRegistryBackend);
 	const service = new Service({url: new URL("http://localhost")});
 	registry.serviceProvider = service;
 
-	return registerTarballsFromCommandline(registry)
+	const s = registerTarballsFromCommandline(registry)
 	.then(() => setupServerAndGetPort(service, registry))
-	.then(port => configureNpmToSpecificLocalhostPort(service, port))
+
+	if (isDebug)
+		return
+
+	return s.then(port => configureNpmToSpecificLocalhostPort(service, port))
 	.then(() => runNpmInstall())
 	.then(() => {
 		console.log("npm done. Shutting down proxy");
 	})
 	.catch(msg => {
+		process.exitCode = 1
 		console.log("An error occurred: " + msg);
 	})
 	.finally(() => {