[SITE] Move to using pipes for js and scss (#15163)

* Move to using pipes for js and scss

* Update contributing doc and remove unneeded files

* More cleanup

* Update and rename Makefile to makefile

in theory this should work

Author: mattstratton

gulp/config.js

@@ -0,0 +1,19 @@
+.PHONY: deps build server clean
+
+# Copy dependencies from node_modules to assets
+deps:
+	./utilities/build-scripts/copy-scss-deps.sh
+	./utilities/build-scripts/copy-js-deps.sh
+
+# Build the site
+build: deps
+	hugo
+
+# Run the development server
+server: deps
+	hugo server
+
+# Clean up generated files
+clean:
+	rm -rf public/
+	rm -rf resources/