Merge branch 'master' into backend/goals

backend/secfit/Dockerfile

backend/secfit/users/forms.py

backend/secfit/users/migrations/0001_initial.py

backend/secfit/users/migrations/0002_auto_20200907_1200.py

backend/secfit/users/migrations/0003_auto_20200907_1954.py

backend/secfit/users/migrations/0004_auto_20200907_2021.py

backend/secfit/users/migrations/0005_auto_20200907_2039.py

backend/secfit/users/migrations/0006_auto_20200907_2054.py

backend/secfit/users/migrations/0007_auto_20200910_0222.py

backend/secfit/users/migrations/0008_auto_20201213_2228.py

backend/secfit/users/migrations/0009_auto_20210204_1055.py

backend/secfit/users/models.py

backend/secfit/users/serializers.py

frontend/www/register.html

frontend/www/scripts/profile.js

frontend/www/scripts/register.js

frontend/www/scripts/workouts.js