modified: package-lock.json ...

modified:   package.json
	new file:   src/config/emailConfig.js
	modified:   src/controllers/contactControllers.js
	modified:   src/utils/sendContactMail.js
	new file:   test/units/utils/sendContactMail/sanitizeInput.unit.test.js
	new file:   test/units/utils/sendContactMail/sendContactMail.unit.test.js
	modified:   yarn.lock