Merge pull request #9225 from RoadieHQ/softer-proxy-startup

allow backend to start if proxy target is not set

.changeset/quick-jars-wait.md

@@ -0,0 +1,26 @@
+---
+'@backstage/plugin-proxy-backend': patch
+---
+
+Adds a new option `skipInvalidTargets` for the proxy `createRouter` which allows the proxy backend to be started with an invalid proxy configuration. If configured, it will simply skip the failed proxy and mount the other valid proxies.
+
+To configure it to pass by failing proxies:
+
+```
+const router = await createRouter({
+  config,
+  logger,
+  discovery,
+  skipInvalidProxies: true,
+});
+```
+
+If you would like it to fail if a proxy is configured badly:
+
+```
+const router = await createRouter({
+  config,
+  logger,
+  discovery,
+});
+```