Tweak npm scripts

* add `--strict` in the mkdocs build like on CI
* add a `start` script to run serve (can be used with `npm start`)
* move `build` to `pretest`

As a result, build runs once on CI now

Author: XhmikosR

.github/workflows/ci.yml

@@ -40,8 +40,5 @@ jobs:
       - name: Install npm dependencies
         run: npm ci
 
-      - name: Build docs
-        run: mkdocs build --strict
-
-      - name: Test
+      - name: Build and test
         run: npm test

package.json

@@ -16,11 +16,13 @@
   },
   "homepage": "https://docs.pi-hole.net/",
   "scripts": {
-    "build": "mkdocs build --clean",
+    "build": "mkdocs build --clean --strict",
     "markdownlint": "markdownlint-cli2 \"**/*.md\" \"!**/node_modules/**\"",
-    "linkinator": "npm run build && linkinator site --recurse --silent --skip \"^(?!http://localhost)\"",
+    "linkinator": "linkinator site --recurse --silent --skip \"^(?!http://localhost)\"",
+    "pretest": "npm run build",
     "test": "npm run markdownlint && npm run linkinator",
-    "serve": "mkdocs serve --dev-addr 0.0.0.0:8000"
+    "serve": "mkdocs serve --dev-addr 0.0.0.0:8000",
+    "start": "npm run serve"
   },
   "devDependencies": {
     "linkinator": "^6.1.2",