Fix for usage of constant port 8080, because this can can problems with default webpack-dev port from metabase frontend, which is also 8080

Author: boehm-gipmbh

README.md

@@ -79,7 +79,11 @@ Start the server by running:
 node index.js
 ```
 
-The app runs by default on port 8080.
+The app runs by default on port 8080. If you want to run it on a different port, set the `PORT` environment variable:
+```sh
+export PORT=8081
+```
+
 
 Visit [http://localhost:8080/analytics](localhost:8080/analytics) and sign in with the following credentials:
 

index.js

@@ -194,7 +194,8 @@ app.get("/sso/metabase", restrict, (req, res) => {
     res.redirect(ssoUrl);
 });
 
-const PORT = 8080;
+const PORT =
+    process.env.PORT || 8080;
 if (!module.parent) {
     app.listen(PORT);
     console.log(`Express started serving on port ${PORT}`);