Refactor main and app class

Changes

• Removed new/delete and raw pointers in main with smart pointers
• Refactored the program already running check in main
• Changed external raw pointer to config with unique_ptr to config in other classes
• Moved HTTP servers in hpp file

Tests

• Tested using the CURL requests described in Wiki

Notes

Branched from branch refactor_sm_policy, should be merged first, see MR !10 (merged)