Rename server.address to my-server.address across properties files and LoginController for consistency and clarity.

backend/src/main/resources/application.properties

@@ -8,5 +8,5 @@ cors.allowed-origins=${CORS:https://alttd.com}
 login.secret=${LOGIN_SECRET:SET_TOKEN}
 particles.file_path=${user.home}/.altitudeweb/particles
 notification.server.url=${SERVER_IP:10.0.0.107}:${SERVER_PORT:8080}
-server.address=${SERVER_ADDRESS:https://alttd.com}
+my-server.address=${SERVER_ADDRESS:https://alttd.com}
 logging.level.com.alttd.altitudeweb=INFO