Merge branch 'new_explore' into 'dev'

src/main/java/NTNU/IDATT1002/controllers/DataExchange.java

src/main/java/NTNU/IDATT1002/controllers/Explore.java

src/main/java/NTNU/IDATT1002/controllers/Search.java

src/main/java/NTNU/IDATT1002/controllers/ViewPicture.java

src/main/java/NTNU/IDATT1002/repository/ImageRepository.java

src/main/java/NTNU/IDATT1002/service/ImageService.java