Add link to scientific-python.org preview (#574)

Author: jarrodmillman

Makefile

@@ -56,6 +56,7 @@ main:
 	git clone --depth 1 https://github.com/scientific-python/scientific-python.org $@
 	(cd $@ ; git submodule update --init content/specs)
 	(cd $@ ; pip install -q -r requirements.txt)
+	(cd $@ ; make calendars ; make core-project-json)
 	(cd $@ ; hugo --themesDir="../..")
 
 blog:

tools/add_preview_links.py

@@ -1,7 +1,7 @@
 filename = "doc/content/_index.md"
 preview_links = """
 {{< admonition attention >}}
-See scientific python, [blog](blog), learn, [tools](tools), scipy, and numpy.
+See [scientific-python](main), [blog](blog), learn, [tools](tools), scipy, and numpy.
 {{< /admonition >}}
 """