fix(website): separate preview and production deployments

Signed-off-by: Hristo Hristov <me@hhristov.info>

Author: Svarrogh1337

netlify.toml

@@ -4,6 +4,8 @@
 
 [build]
 publish = "public"
+command = "npm install --save-dev autoprefixer && npm install --save-dev postcss-cli && npm install -D postcss && hugo --gc --minify --baseURL $URL"
+[context.deploy-preview]
 command = "npm install --save-dev autoprefixer && npm install --save-dev postcss-cli && npm install -D postcss && hugo --gc --minify --baseURL $DEPLOY_PRIME_URL"
 
 [context.production.environment]