Fixed outdated github action

.github/workflows/gh-pages.yml

@@ -8,17 +8,12 @@ on:
 
 jobs:
   deploy:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     concurrency:
       group: ${{ github.workflow }}-${{ github.ref }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
-
-      - name: Build
-        uses: jzweifel/gatsby-cli-github-action@master
-        with:
-          gatsby-arg: build
+        uses: actions/checkout@v3
 
       - name: Deploy
         uses: peaceiris/actions-gh-pages@v3

.gitignore

@@ -56,7 +56,6 @@ typings/
 
 # gatsby files
 .cache/
-public
 
 # Mac files
 .DS_Store

public/manifest.json

@@ -0,0 +1,41 @@
+{
+  "name": "App",
+  "icons": [
+    {
+      "src": "/android-icon-36x36.png",
+      "sizes": "36x36",
+      "type": "image/png",
+      "density": "0.75"
+    },
+    {
+      "src": "/android-icon-48x48.png",
+      "sizes": "48x48",
+      "type": "image/png",
+      "density": "1.0"
+    },
+    {
+      "src": "/android-icon-72x72.png",
+      "sizes": "72x72",
+      "type": "image/png",
+      "density": "1.5"
+    },
+    {
+      "src": "/android-icon-96x96.png",
+      "sizes": "96x96",
+      "type": "image/png",
+      "density": "2.0"
+    },
+    {
+      "src": "/android-icon-144x144.png",
+      "sizes": "144x144",
+      "type": "image/png",
+      "density": "3.0"
+    },
+    {
+      "src": "/android-icon-192x192.png",
+      "sizes": "192x192",
+      "type": "image/png",
+      "density": "4.0"
+    }
+  ]
+}

public/page-data/dev-404-page/page-data.json

@@ -0,0 +1,5 @@
+{
+    "componentChunkName": "component---cache-dev-404-page-js",
+    "path": "/dev-404-page/",
+    "result": {"data":{"allSiteFunction":{"nodes":[]},"allSitePage":{"nodes":[{"path":"/"},{"path":"/talks/"}]}},"pageContext":{}},
+    "staticQueryHashes": []}

public/page-data/index/page-data.json

@@ -0,0 +1,5 @@
+{
+    "componentChunkName": "component---src-pages-index-js",
+    "path": "/",
+    "result": {"pageContext":{}},
+    "staticQueryHashes": []}