Check DOCKER_ENABLE_SECURITY for UI (#1103)

When using `DOCKER_ENABLE_SECURITY=false`, the logout button and `Account Settings` are no longer displayed.

src/main/java/stirling/software/SPDF/config/security/SecurityConfiguration.java

@@ -166,4 +166,9 @@ public class SecurityConfiguration {
     public PersistentTokenRepository persistentTokenRepository() {
         return new JPATokenRepositoryImpl();
     }
+
+    @Bean
+    public boolean activSecurity() {
+        return true;
+    }
 }