Release 5.5.0

• fix: security issue update tomcat (#167) (cee7714)
• add: separate each level of config as a class (#164) (794c264) (#166) (28bed85)
• Refactor Config class, separating its responsibilities into PortalConfig and ConfigLoader (#163) (bcaf8ec)
• Improve code formatting (#162) (c2f02a3) (afa454f)
• Improve ontology configuration handling (#160) (7101a3a) (#161) (382d5f2)