chore: add docs start script deps, add docs build back to CI build workflow

Author: lizschwab

.github/workflows/build.yml

@@ -53,7 +53,7 @@ jobs:
         working-directory: ./packages/blockly
 
       - name: Run Build
-        run: npm run build
+        run: npm run build:all
 
       - name: Run Test
         run: npm run test

packages/docs/package.json

@@ -5,6 +5,15 @@
   "description": "Blockly documentation site",
   "nx": {
     "targets": {
+      "start": {
+        "dependsOn": [
+          "^build",
+          {
+            "projects": "blockly",
+            "target": "docs"
+          }
+        ]
+      },
       "build": {
         "dependsOn": [
           {