diff --git a/.github/workflows/netlify-pr.yaml b/.github/workflows/netlify-pr.yaml
index 672b953..52c4bf6 100644
--- a/.github/workflows/netlify-pr.yaml
+++ b/.github/workflows/netlify-pr.yaml
@@ -37,6 +37,13 @@ jobs:
           name: previewbuild
           path: webapp
 
+      - name: Add redirects file
+        # We fetch from github directly as we don't bother checking out the repo
+        run: curl -s https://raw.githubusercontent.com/vector-im/element-call/main/config/netlify_redirects > webapp/_redirects
+
+      - name: Add config file
+        run: curl -s https://raw.githubusercontent.com/vector-im/element-call/main/config/element_io_preview.json > webapp/config.json
+
       - name: ☁️ Deploy to Netlify
         id: netlify
         uses: nwtgck/actions-netlify@v1.2
diff --git a/config/element_io_preview.json b/config/element_io_preview.json
new file mode 100644
index 0000000..7afb8f6
--- /dev/null
+++ b/config/element_io_preview.json
@@ -0,0 +1,8 @@
+{
+  "default_server_config": {
+    "m.homeserver": {
+      "base_url": "https://call.ems.host",
+      "server_name": "call.ems.host"
+    }
+  }
+}