Change Node version used in Github workflows, add build-storybook step to website test (#12748)

Context: The "Deploy Fleet website" workflow is currently failing
because the `build-storybook` step requires Node v16.
<img width="1013" alt="image"
src="https://github.com/fleetdm/fleet/assets/7445991/7681e11e-a94f-4a0b-8cd8-baa1ef5a37d8">

Changes:
- Changed the `deploy-fleet-website` and `test-website` workflows to use
Node 16.
- Updated the version of `actions/setup-node` to v3 to use node 16.
- added the `--legacy-peer-deps` flag to the `npm install` in the
build-storybook step
- Added a step to build the storybook to the `test-website` workflow.
- Updated the `test-website` workflow to run when the workflow file is
changed.

.github/workflows/deploy-fleet-website.yml

@@ -31,7 +31,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [14.x]
+        node-version: [16.x]
 
     steps:
     - uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b # v2
@@ -47,7 +47,7 @@ jobs:
 
     # Set the Node.js version
     - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@f1f314fca9dfce2769ece7d933488f076716723e # v1
+      uses: actions/setup-node@v3
       with:
         node-version: ${{ matrix.node-version }}
 
@@ -59,7 +59,7 @@ jobs:
         go-version: 1.19
 
     # Download top-level dependencies and build Storybook in the website's assets/ folder
-    - run: npm install && npm run build-storybook -- -o ./website/assets/storybook --loglevel verbose
+    - run: npm install --legacy-peer-deps && npm run build-storybook -- -o ./website/assets/storybook --loglevel verbose
 
     # Now start building!
     # > …but first, get a little crazy for a sec and delete the top-level package.json file

.github/workflows/test-website.yml

@@ -8,6 +8,7 @@ on:
       - 'handbook/**'
       - 'schema/**'
       - 'articles/**'
+      - '.github/workflows/test-website.yml'
 
 # This allows a subsequently queued workflow run to interrupt previous runs
 concurrency:
@@ -28,17 +29,21 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [14.x]
+        node-version: [16.x]
 
     steps:
     - uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b # v2
 
     # Set the Node.js version
     - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@f1f314fca9dfce2769ece7d933488f076716723e # v1
+      uses: actions/setup-node@v3
       with:
         node-version: ${{ matrix.node-version }}
 
+
+    # Download top-level dependencies and build Storybook in the website's assets/ folder.
+    - run: npm install --legacy-peer-deps && npm run build-storybook -- -o ./website/assets/storybook --loglevel verbose
+
     # Now start building!
     # > …but first, get a little crazy for a sec and delete the top-level package.json file
     # > i.e. the one used by the Fleet server.  This is because require() in node will go