Switch order config files are loaded in netlify build

This allows admins to override anything generated by the netlify build plugin in _config.yml
Whereas previously, the generated values would override anything specified in _config.yml

Author: timwis

.gitignore

@@ -4,3 +4,4 @@ _site
 _config.dev.yml
 node_modules
 *.map
+_config.ci.yml

netlify.toml

@@ -1,5 +1,5 @@
 [build]
-  command = "jekyll build --config _config.yml,_config_override.yml"
+  command = "jekyll build --config _config.ci.yml,_config.yml"
   publish = "_site"
   environment = { JEKYLL_ENV = "production" }
 

netlify/plugins/netlify-jekyll-metadata/index.js

@@ -7,7 +7,7 @@ export const onPreBuild = async function () {
   const repoNameWithOwner = repoUrl.pathname.replace(/^\/+/, '')
   const branch = process.env.BRANCH
 
-  const fileName = '_config_override.yml'
   const fileContents = `repository: ${repoNameWithOwner}\nurl: ${siteUrl}\nbranch: ${branch}\nbaseurl: ""`
+  const fileName = '_config.ci.yml'
   return fs.promises.writeFile(fileName, fileContents)
 }