poc load file

initdb/1_TABLES.sql

initdb/2_DEFAULT_ENTRIES.sql

...om/example/livecodingjavaspring/AddFileToUserRequest.java

src/main/java/com/example/livecodingjavaspring/App.java

src/main/java/com/example/livecodingjavaspring/Image.java

src/main/java/com/example/livecodingjavaspring/ImageDao.java

src/main/java/com/example/livecodingjavaspring/User.java

...m/example/livecodingjavaspring/UserLibraryController.java

...ain/java/com/example/livecodingjavaspring/UserMapper.java

src/main/resources/application.properties