Configure UM Trace iOS signing and deployment

.gitignore

@@ -6,6 +6,18 @@
 # dotenv files
 .env
 
+# Local iOS deployment target (contains a personal device UDID).
+.ios-device
+
+# Apple signing credentials and provisioning artifacts. Keep these in Keychain or
+# an approved secret store; never commit them to the application repository.
+*.cer
+*.p12
+*.p8
+*.mobileprovision
+*.provisionprofile
+*.certSigningRequest
+
 # User-specific files
 *.rsuser
 *.suo