build: create a separate tsconfig file for build

src/package.json

@@ -4,7 +4,9 @@
   "description": "Deployment from the Angular CLI to the file system. This is a sample project that helps you to implement your own deployment builder (`ng deploy`) for the Angular CLI.",
   "main": "index.js",
   "scripts": {
-    "build": "rimraf dist && json2ts deploy/schema.json > deploy/schema.d.ts && tsc && copyfiles README.md builders.json collection.json ng-add-schema.json package.json ngx-deploy-starter deploy/schema.json dist",
+    "prebuild": "rimraf dist && json2ts deploy/schema.json > deploy/schema.d.ts",
+    "build": "tsc -p tsconfig.build.json",
+    "postbuild": "copyfiles README.md builders.json collection.json ng-add-schema.json package.json ngx-deploy-starter deploy/schema.json dist",
     "test": "jest",
     "prettier": "prettier --write ."
   },

src/tsconfig.build.json

@@ -0,0 +1,4 @@
+{
+  "extends": "./tsconfig.json",
+  "exclude": ["node_modules", "test", "**/*spec.ts"]
+}