fix(angular): add prod param to build command (#278)

Author: tkrugg

scripts/__snapshots__/e2e-templates.test.js.snap

@@ -250,7 +250,7 @@ exports[`Templates Angular InstantSearch File content: package.json 1`] = `
   \\"scripts\\": {
     \\"ng\\": \\"ng\\",
     \\"start\\": \\"ng serve --port 3000\\",
-    \\"build\\": \\"ng build\\",
+    \\"build\\": \\"ng build --prod\\",
     \\"test\\": \\"ng test\\",
     \\"lint\\": \\"ng lint\\",
     \\"e2e\\": \\"ng e2e\\"

src/templates/Angular InstantSearch/package.json

@@ -5,7 +5,7 @@
   "scripts": {
     "ng": "ng",
     "start": "ng serve --port 3000",
-    "build": "ng build",
+    "build": "ng build --prod",
     "test": "ng test",
     "lint": "ng lint",
     "e2e": "ng e2e"