(SP: 1) Offer model validation

[Roman-Peretiatko]

Description

There should be the following validation rules for Offer model:

• price must be required and have min value that equals 1
• proficiencyLevel must be required
• title must be required, have length in range 1-100 symbols and be trimmed
• description must be required, have length in range 1-1000 symbols and be trimmed
• languages must be required
• authorRole must be required
• author must be required
• subject must be required
• category must be required
• faq – questions and answers must be required and trimmed

Acceptance Criteria

• all of the rules above must be addded