Marked minor, although it is major-ish...

.changeset/old-falcons-jump.md

@@ -0,0 +1,25 @@
+---
+'@backstage/plugin-newrelic': minor
+---
+
+The New Relic plugin now uses the Backstage proxy to communicate with New Relic's API.
+
+Please update your `app-config.yaml` as follows:
+
+```yaml
+# Old Config
+newrelic:
+  api:
+    baseUrl: 'https://api.newrelic.com/v2'
+    key: NEW_RELIC_REST_API_KEY
+```
+
+```yaml
+# New Config
+proxy:
+  '/newrelic/apm/api':
+    target: https://api.newrelic.com/v2
+    headers:
+      X-Api-Key:
+        $env: NEW_RELIC_REST_API_KEY
+```