This is your conection string:
Provider=Microsoft.ACE.OLEDB.12. 0;Data Source="C:\Users\jallasSQL\Documents\Computer Engineer.accdb"
So, presumably that is the folder that contains the data file on your own development machine. The reason that the connection string is placed in the config file is specifically so that it can be edited after deployment in case the the database is in a different location. The user needs to edit the connection string to use the path of the data file on their machine.
The alternative is to use a location and connection string that will work on all systems. The way local data files are usually handled is to add the file to the project, so that the original is in the source folder with all the other source files, and then let the IDE copy it to the output folder when you build. That has several advantages. First, it means that you can use |DataDirectory| for the folder path in the connection string and then it will work without modification on all systems. Second, it means that your source database is not polluted with test data so each user receives it in pristine condition.