working 3 tier approach

src/environments/environment.prod.ts

@@ -0,0 +1,5 @@
+export const environment = {
+  production: true,
+  // In production the API is proxied through nginx at /api — no host needed.
+  apiBaseUrl: '',
+};

src/environments/environment.ts

@@ -0,0 +1,4 @@
+export const environment = {
+  production: false,
+  apiBaseUrl: 'http://localhost:8000',
+};