Add environment variable defaults

src/environments/environment.dev.ts

@@ -0,0 +1,7 @@
+// The file contents for the current environment will overwrite these during build.
+// The build system defaults to the dev environment which uses `environment.dev.ts`.
+// When you run a build command using a flag, (e.g. --prod) then `environment.ts` will be used instead.
+
+export const ENV = {
+  production: false
+};

src/environments/environment.ts

@@ -0,0 +1,3 @@
+export const ENV = {
+  production: true
+};

tsconfig.json

@@ -11,7 +11,13 @@
     "module": "es2015",
     "moduleResolution": "node",
     "sourceMap": true,
-    "target": "es5"
+    "target": "es5",
+    "baseUrl": "./src",
+    "paths": {
+      "@app/env": [
+        "environments/environment"
+      ]
+    }
   },
   "include": [
     "src/**/*.ts"