Merge branch 'origin/dev' into feat/auth

src/app.module.ts

src/configuration/config.ts

src/configuration/configuration.service.ts

src/mailer/mail-templates/changeEmail.ejs

src/mailer/mail-templates/changeEmail.json

src/mailer/mail-templates/verify.ejs

src/mailer/mail-templates/verify.json

src/mailer/mailer.module.ts

src/mailer/mailer.service.spec.ts

src/mailer/mailer.service.ts

src/structures/structures.module.ts

template.env