diff --git a/.github/workflows/pr-preview.yml b/.github/workflows/pr-preview.yml
index efd1c56..7d29f19 100644
--- a/.github/workflows/pr-preview.yml
+++ b/.github/workflows/pr-preview.yml
@@ -15,6 +15,9 @@ jobs:
         with:
           node-version: 16.14.2
 
+      - name: Set env
+        run: echo "PUBLIC_URL=pr-${{ github.event.number }}" >> $GITHUB_ENV
+
       - name: NPM Install and Build
         run: |
           npm install
diff --git a/app.json b/app.json
deleted file mode 100644
index 738c031..0000000
--- a/app.json
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-    "name": "gbc-deposit-ui",
-    "description": "Gnosis Beacon Chain Deposit UI",
-    "env": {
-        "REACT_APP_NETWORK_IDS": "100,10200",
-        "NODE_OPTIONS": "--max_old_space_size=1024"
-    }
-}
\ No newline at end of file