Raise ngninx upload limit to 100m
Fix salt error on missing email_host_user

Error message:
    ---
        State: - file
        Name:      /home/users/ode_frontend/django_ode/django_ode/settings/local.py
        Function:  managed
            Result:    False
            Comment:   Undefined jinja variable; line 25 in template

    ---
    [...]
        }
    }

    # SMTP server
    EMAIL_HOST = "{{ pillar['email_host'] }}"
    {% if pillar['email_host_user'] %}    <======================
    EMAIL_HOST_USER = "{{ pillar['email_host_user'] }}"
    EMAIL_HOST_PASSWORD = "{{ pillar['email_host_password'] }}"
    {% endif %}
    EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'

    [...]

    ---
            Changes:
    ----------
        State: - file
        Name:      /home/users/ode_api/ode/production.ini
        Function:  managed
            Result:    False
            Comment:   Undefined jinja variable; line 98 in template

    ---
    [...]
    qualname = exc_logger

    [handler_email]
    level = ERROR
    class = handlers.SMTPHandler
    args = (('localhost', 25), '{{ pillar['default_from_email'] }}', [{{ admins }}],
    'ODE Exception'{% if pillar['email_host_user'] %}, ("{{
    pillar['email_host_user'] }}", "{{ pillar['email_host_password'] }}"){% endif
    %})    <======================
    formatter = exception

    [handler_file]
    level = ERROR
    class = logging.handlers.RotatingFileHandler
    [...]
    ---