Migrating the base API URL for the react native example to an .env file.

examples/bot-ready-signalling/client/react-native/package-lock.json

@@ -21,6 +21,7 @@
         "react": "18.3.1",
         "react-native": "0.76.3",
         "react-native-background-timer": "^2.4.1",
+        "react-native-dotenv": "^3.4.11",
         "react-native-get-random-values": "^1.11.0"
       },
       "devDependencies": {
@@ -9223,6 +9224,18 @@
         "react-native": ">=0.47.0"
       }
     },
+    "node_modules/react-native-dotenv": {
+      "version": "3.4.11",
+      "resolved": "https://registry.npmjs.org/react-native-dotenv/-/react-native-dotenv-3.4.11.tgz",
+      "integrity": "sha512-6vnIE+WHABSeHCaYP6l3O1BOEhWxKH6nHAdV7n/wKn/sciZ64zPPp2NUdEUf1m7g4uuzlLbjgr+6uDt89q2DOg==",
+      "license": "MIT",
+      "dependencies": {
+        "dotenv": "^16.4.5"
+      },
+      "peerDependencies": {
+        "@babel/runtime": "^7.20.6"
+      }
+    },
     "node_modules/react-native-get-random-values": {
       "version": "1.11.0",
       "resolved": "https://registry.npmjs.org/react-native-get-random-values/-/react-native-get-random-values-1.11.0.tgz",