Add HTTPS support by giving an SSL Cert and Key

packages/cli/src/Server.ts

@@ -97,6 +97,10 @@ class App {
 	push: Push.Push;
 	versions: IPackageVersions | undefined;
 
+	protocol: string;
+	ssl_key:  string;
+	ssl_cert: string;
+
 	constructor() {
 		this.app = express();
 
@@ -112,6 +116,10 @@ class App {
 		this.push = Push.getInstance();
 
 		this.activeExecutionsInstance = ActiveExecutions.getInstance();
+
+		this.protocol = config.get('protocol');
+		this.ssl_key  = config.get('ssl_key');
+		this.ssl_cert = config.get('ssl_cert');
 	}
 
 
@@ -1254,8 +1262,23 @@ export async function start(): Promise<void> {
 	const app = new App();
 
 	await app.config();
+	
+	// Differntiate HTTP and HTTPS server
+	const http  = require('http');
+	const https = require('https');
+	const fs    = require('fs');
+	var server;
 
-	app.app.listen(PORT, async () => {
+	if(app.protocol === 'https'){
+		const privateKey = fs.readFileSync(app.ssl_key,'utf8');
+		const cert = fs.readFileSync(app.ssl_cert,'utf8');
+		const credentials = {key: privateKey,cert: cert};
+		server = https.createServer(credentials,app.app);
+	}else{
+		server = http.createServer(app.app);
+	}
+
+	server.listen(PORT, async () => {
 		const versions = await GenericHelpers.getVersions();
 		console.log(`n8n ready on port ${PORT}`);
 		console.log(`Version: ${versions.cli}`);