fix typeo:'db/job_vacanvy_development.db' to 'db/job_vacancy_development.db'
'Now this customers' to 'Now this customer'
'all corresponding job for ' to 'all corresponding jobs for '
'an user' to 'a user'. 'User' starts with the consonant sound y, not with a vowel sound, even though it is spelled with a vowel as the first letter.
user_id is added to the job_offers table, not the users table