add action to deploy to staging manually

.github/workflows/build_staging.yml

@@ -0,0 +1,22 @@
+name: Build And Stage
+
+on:
+    workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: "npm"
+      - run: npm ci
+      - run: npm run staging
+      - run: npm run rename_index_files
+      - name: Install LFTP
+        run: sudo apt update && sudo apt -qq -y install lftp
+      - name: Upload ftp
+        run: lftp storage.bunnycdn.com -u open-meteo-staging,${{ secrets.ftp_password_staging }} -e "set ftp:ssl-force false; set ssl:verify-certificate false; mirror --reverse --continue --dereference -x ^\.git/$ build .; quit"
+      - run: "curl --request POST --url https://api.bunny.net/pullzone/277769/purgeCache --header 'AccessKey: ${{ secrets.bunny_api_key }}' --header 'content-type: application/json'"