Update GitHub Actions to use npm scripts instead of direct gulp commands

- Replace 'gulp prod' with 'npm run build' in all workflows
- Replace 'gulp serve --build-only' with 'npm run build:dev'
- Remove unnecessary 'gulp-cli' global installation
- Align CI/CD with README documentation and modern npm script patterns
- Ensures GitHub Actions follow the same build process as local development

Fixes build failures by using the documented npm scripts approach.

Author: Dale Kunce

.github/workflows/deploy.yml

@@ -42,14 +42,11 @@ jobs:
       - name: Install Node.js dependencies
         run: npm ci
 
-      - name: Install Gulp CLI
-        run: npm install -g gulp-cli
-
       - name: Lint JavaScript
         run: npm run lint
 
       - name: Build site
-        run: gulp prod
+        run: npm run build
         env:
           JEKYLL_ENV: production
 

.github/workflows/manual-deploy.yml

@@ -39,23 +39,21 @@ jobs:
           cache: 'npm'
 
       - name: Install dependencies
-        run: |
-          npm ci
-          npm install -g gulp-cli
+        run: npm ci
 
       - name: Run tests
         if: ${{ !inputs.skip_tests }}
         run: npm test
 
       - name: Build for staging
         if: ${{ inputs.environment == 'staging' }}
-        run: gulp serve --build-only
+        run: npm run build:dev
         env:
           JEKYLL_ENV: development
 
       - name: Build for production
         if: ${{ inputs.environment == 'production' }}
-        run: gulp prod
+        run: npm run build
         env:
           JEKYLL_ENV: production
 

.github/workflows/test.yml

@@ -27,14 +27,11 @@ jobs:
       - name: Install Node.js dependencies
         run: npm ci
 
-      - name: Install Gulp CLI
-        run: npm install -g gulp-cli
-
       - name: Lint JavaScript
         run: npm run lint
 
       - name: Test build process
-        run: gulp prod
+        run: npm run build
         env:
           JEKYLL_ENV: production