React router direct links not working on Azure Web App Linux

Question

I've developed an PoC about PWA (Progressive Web Apps) using ReactJs to show how to use camera, geolocation, microphone, light sensors and etc from Browser API.

I've created a route for each feature in this web app and everything works fine in localhost. But when I deploy the npm build version of my react app on Azure Wep App Linux service it don't work properly. I can access the main page (index.html) and from there I can navigate to any other page, but when I try access any route direct form its url I receive an 404 error. Except from index page all urls don't work when refreshing or writing manually.

Ex:
https://pwa.mypoc.dev/ -- Works fine
https://pwa.mypoc.dev/lights -- Do Not Work

I'v used this command on azure "Settings" > "General settings" > "Startup Command":

pm2 serve /home/site/wwwroot/build --no-daemon

I've found a question related to it but the answer did not help me, as I'm not using web.config because it is a Linux machine running Node 10 LTS: React App not starting in azure app service

Answer 1

After a little more research I found the problem. As Linux Azure Web Apps uses pm2 to serve a node app I found the answer looking into the official documentation.

PM2 is a daemon process manager that will help you manage and keep your application online. Getting started with PM2 is straightforward, it is offered as a simple and intuitive CLI, installable via NPM.

https://pm2.keymetrics.io/docs/usage/pm2-doc-single-page/#serving-spa-redirect-all-to-indexhtml

Just need to add the --spa option into the Startup Command on Azure Web Apps Linux General Settings:

pm2 serve /home/site/wwwroot/build --no-daemon --spa

Using --spa option pm2 will automatically redirect all queries to the index.html and then react router will do its magic.