Set up environment-based configurations for API and builds.

Replaced hardcoded API URLs with environment-specific configurations. Added new environments (development, beta, production) with respective settings. Updated build scripts and Angular file replacements to support environment-based builds.

frontend/angular.json

@@ -41,7 +41,7 @@
               "fileReplacements": [
                 {
                   "replace": "src/environments/environment.ts",
-                  "with": "src/environments/environment.prod.ts"
+                  "with": "src/environments/environment.production.ts"
                 }
               ],
               "optimization": true,
@@ -55,7 +55,29 @@
             },
             "development": {
               "sourceMap": true,
-              "optimization": false
+              "optimization": false,
+              "fileReplacements": [
+                {
+                  "replace": "src/environments/environment.ts",
+                  "with": "src/environments/environment.development.ts"
+                }
+              ]
+            },
+            "beta": {
+              "fileReplacements": [
+                {
+                  "replace": "src/environments/environment.ts",
+                  "with": "src/environments/environment.beta.ts"
+                }
+              ],
+              "optimization": true,
+              "outputHashing": "all",
+              "sourceMap": false,
+              "extractCss": true,
+              "namedChunks": false,
+              "logging": false,
+              "vendorChunk": false,
+              "buildOptimizer": true
             }
           }
         },