sockjs-node | WebSocket emulation - Node.js server | Websocket library

I am making a demo Vue.js 3 app with tailwind and typescript. Whenever I run the app I get an error reading:

I am new to angular and was following the documentation to build a basic app.

Node - v14.7.3
npm - 7.22.0
Angular CLI: 12.2.4
OS: win32 x64
@angular-devkit/architect 0.1202.4
@angular-devkit/build-angular 12.2.4
@angular-devkit/core 12.2.4
@angular-devkit/schematics 12.2.4
@schematics/angular 12.2.4
rxjs 6.6.7
typescript 4.3.5

So far all I have done is

npm install @angular/cli

followed by ng new firstApp

and ng serve

Following is the error that I am receiving,

I am developing an application using Vue, Quasar, and the animate.css package for CSS animations in my website. Everything has been going smoothly until recently I was having an issue with the npm run build command, which leads to the error in the title. Upon some investigation, I tried to install the postcss-rtlcss package, which led to this error occurring on npm run serve as well. Please note that I am relatively new to the Vue and node.js ecosystem, so please let me know if I am doing something completely wrong.

The error upon running npm run serve

i have this problem when trying to compile a Vue2 project

I'm new to vue and those types of webservers, so please forgive me. Before I install vue-router my project is fine, but after I install it, I've got this really strange error in any new vue project (created using the vue cli):

I am trying to integrate Opentelemetry (Otl) in my Angular application to trace the frontend calls. Everything works fine and I am able to see the calls in the Zipkin.

But the only problem is that it is showing it as "unknown_service" in the Zipkin interface.

Below is my entire Angular code and Zipkin screenshot as well. This is just a sample application. But my requirement is that I am going to integrate the Opentelemetry code in the http interceptor so that it will be easy to maintain at one place instead of every service call. Also service.name should be passed dynamically so that it will be traced in Zipkin.

How can I add a service name before it gets called?

I do have problems to understand the 'new' npm behavior in some points:

1. npm >= 7 is more strict about peer dependencies. I already posted a question for this here. But I still don't understand completely the benefit of the 'new' behavior. I hope to get more practical explanation. Now every of my repositories throws these error doing npm install and as far as I understand, I can't really do anything about this behaviour, as the maintainer should have updated there packages. But in real life there will never be the point where all packages are up to date.

2. I do get multiple vulnerabilites reports, but npm audit fix mostly doesn't fix any vulnerability. Here the same problem: It can only be handled by the maintainer, so I can't do anything. So how should I handle those reports practically?

3. Similar thing with deprecation messages. As an example sockjs-node which is using uuid 3.4.0 - latest is 8.3.2. But the maintainer doesn't update the package, as there is no need for that in his view. So here the same thing: The maintainer is the only one who can solve the problem.

In all of these cases I would like to know how to handle those things. What are you doing? In my CI pipeline I do get many deprecation messages and I must use --legacy-peer-deps which practically means I have to use npm 6 and I also get many vulnerabilities reported.

So it will never be possible to get a "clean" install, right?

What is the value of reports/messages, if they are always there so they get 'normal' and I have to ignore them?

I have three Docker containers: a backend, a frontend and an nginx container that handle requests. When I run it on my computer (windows laptop with docker engine), everything works perfectly. I can see the call are made in the logs of the containers:

After running the yarn build getting the dist folder. While running the index.html I am getting the white blank page.

File structure:-