Fix build error with windows=y and docker=y combination
Fixes
@@ -2,7 +2,7 @@ pytz==2018.9 # https://github.com/stub42/pytz
python-slugify==2.0.1 # https://github.com/un33k/python-slugify
Pillow==5.4.1 # https://github.com/python-pillow/Pillow
{%- if cookiecutter.use_compressor == "y" %}
-rcssmin==1.0.6{% if cookiecutter.windows == 'y' %} --install-option="--without-c-extensions"{% endif %} # https://github.com/ndparker/rcssmin
+rcssmin==1.0.6{% if cookiecutter.windows == 'y' and use_docker == 'n' %} --install-option="--without-c-extensions"{% endif %} # https://github.com/ndparker/rcssmin
{%- endif %}
argon2-cffi==19.1.0 # https://github.com/hynek/argon2_cffi
{%- if cookiecutter.use_whitenoise == 'y' %}
