FitnessTracker | simple little android application | Android library

I'm a Spring MVC beginner and I'm following a tutorial about how to use it. On my main page which is "http://localhost:8080/FitnessTracker/" I don't have any problems, but when I try to access to, for example, "http://localhost:8080/FitnessTracker/addGoal.html", it says what i wrote on the title.

My web.xml is the next one:

I have a simple Web API and I am trying to use entity framework core code first, with an external sql server database hosted on AWS RDS. My aim is for EF to create my model database/tables automatically, based on my context and models, the first time I use Swagger to create an object. Although when I try to post an object to my API with Swagger, tables do not get created and instead I get the following error: Microsoft.EntityFrameworkCore.DbUpdateException: An error occurred while updating the entries. See the inner exception for details. ---> Microsoft.Data.SqlClient.SqlException (0x80131904): Invalid object name 'Users'.

Did I set up EF incorrectly?

Db Context:

I have a UserData class which holds all user information e.g. name, age, height, weight etc. I also have a WorkoutData class which holds all information of a gym workout e.g. date, workout duration, workout details, calories burned etc.

A user can have many personal workouts associated with it, therefore it also has a List of WorkoutData which represents all of a users past workouts.

When a user adds(posts) a workout I will need the workout to be added to the List in the UserData object, so when I get a User it will show all of the users workouts from the list. Although I am not quite sure how to do this, or the correct way to do it.

UserData and WorkoutData:

After I've cloned JQWidget Github repository and installed the angular-fitnesstracker app with: