Restrict file limit size when uploading resume.

[ntdkhiem]

Application will slow down or crash if the file size is greater than 1mb.

Potential Solution:

• restrict file size to less than or equal to 1mb.

[ntdkhiem]

The dashboard already has set a size limit of under 2MB for resume already. Considering labeling and validating that during the registration process

[ntdkhiem]

If the file size is over 2MB or file type is not .pdf, the dashboard automatically rejects the submission without displaying any error message.

[ntdkhiem]

Btw, I can't replicate the server crashing here so I'll remove the high priority tag to focus on other tasks.