move rest api url to a single location

src/app/abstraction/agent.service.ts

 import { Injectable, inject } from '@angular/core';
 import { HttpClient } from '@angular/common/http';
 import { Observable, catchError, of } from 'rxjs';
+import {environment} from "../../environments/environment";
 
 export interface PackageEntry {
   module_name: string;
@@ -26,7 +27,7 @@ export interface AgentRemoval {
 })
 export class AgentService {
   private http: HttpClient = inject(HttpClient);
-  private apiUrl = 'http://127.0.0.1:8000/api/v1/agents/';
+  private apiUrl = environment.restApiUrl + '/agents/';
 
   constructor() {}
 

src/app/abstraction/environment.service.ts

 import { inject, Injectable } from '@angular/core';import { HttpClient } from '@angular/common/http';
 import { Observable } from 'rxjs';
+import {environment} from "../../environments/environment";
 
 export interface IEnvironment {
   id: string;
@@ -48,7 +49,7 @@ interface IValidationError {
 export class EnvironmentService {
 
   private http: HttpClient = inject(HttpClient);
-  private apiUrl = 'http://127.0.0.1:8000/api/v1/environment/';
+  private apiUrl = environment.restApiUrl + '/environment/';
 
   constructor() { }
 

src/app/abstraction/scenario.service.ts

 import { inject, Injectable } from '@angular/core';import { HttpClient } from '@angular/common/http';
 import {catchError, map, Observable, of, switchMap} from 'rxjs';
+import {environment} from "../../environments/environment";
 
 export interface IAvailableScenarios {
   available_configurations: string[];
@@ -16,7 +17,7 @@ export interface IScenario {
 export class ScenarioService {
 
   private http: HttpClient = inject(HttpClient);
-  private apiUrl = 'http://127.0.0.1:8000/api/v1/scenario/';
+  private apiUrl = environment.restApiUrl + '/scenario/';
 
   constructor() {}
 

src/environments/environment.ts

+// src/environments/environment.ts
+// used when we run `ng serve` or `ng build`
+export const environment = {
+  restApiUrl: 'http://localhost:8000/api/v1/'
+};