feat: add bundled configuration for Vercel

bridgetown-core/lib/bridgetown-core/configurations/vercel.rb

@@ -0,0 +1,4 @@
+# frozen_string_literal: true
+
+copy_file in_templates_dir("vercel.json"), "vercel.json"
+copy_file in_templates_dir("vercel_url.rb"), "plugins/builders/vercel_url.rb"

bridgetown-core/lib/bridgetown-core/configurations/vercel/vercel.json

@@ -0,0 +1,45 @@
+{
+  "cleanUrls": true,
+  "trailingSlash": false,
+  "redirects": [],
+  "headers": [
+    {
+      "source": "/(.*)",
+      "headers": [
+        {
+          "key": "X-Content-Type-Options",
+          "value": "nosniff"
+        },
+        {
+          "key": "X-Frame-Options",
+          "value": "DENY"
+        },
+        {
+          "key": "X-XSS-Protection",
+          "value": "1; mode=block"
+        },
+        {
+          "key": "Referrer-Policy",
+          "value": "strict-origin"
+        },
+        {
+          "key": "Permissions-Policy",
+          "value": "geolocation=(self), microphone=()"
+        }
+      ]
+    },
+    {
+      "source": "/feed.xml",
+      "headers": [
+        {
+          "key": "Content-Type",
+          "value": "application/rss+xml"
+        },
+        {
+          "key": "Cache-Control",
+          "value": "public, max-age=3600"
+        }
+      ]
+    }
+  ]
+}

bridgetown-core/lib/bridgetown-core/configurations/vercel/vercel_url.rb

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+class Builders::VercelUrl < SiteBuilder
+  def build
+    hook :site, :pre_render do |site|
+      next unless ENV["VERCEL_URL"] && ENV["VERCEL_ENV"] != "production"
+
+      Bridgetown.logger.info("Subbing Vercel URL")
+      site.config.update(url: "https://#{ENV["VERCEL_URL"]}")
+    end
+  end
+end

bridgetown-website/src/_docs/bundled-configurations.md

@@ -17,6 +17,7 @@ The configurations we include are:
 - [Bridgetown recommended PostCSS plugins](#bridgetown-recommended-postcss-plugins) (`bt-postcss`)
 - [Render YAML Configuration](#render-yaml-configuration) (`render`)
 - [Netlify TOML Configuration](#netlify-toml-configuration) (`netlify`)
+- [Vercel JSON Configuration](#vercel-json-configuration) (`vercel`)
 - [Automated Test Suite using Minitest](#automated-test-suite-using-minitest) (`minitesting`)
 - [Cypress](#cypress) (`cypress`)
 
@@ -120,6 +121,16 @@ bin/bridgetown configure render
 bin/bridgetown configure netlify
 ```
 
+### Vercel JSON Configuration
+
+⚙️ Adds a basic configuration to your site for use in [Vercel](https://vercel.com) deployments along with a builder to ensure Bridgetown uses the correct `absolute_url` on preview deployments.
+
+🛠 **Configure using:**
+
+```sh
+bin/bridgetown configure vercel
+```
+
 ### Automated Test Suite using Minitest
 
 ⚙️ Adds a basic test suite using [Minitest](https://rubygems.org/gems/minitest) and Rails DOM assertions for extremely fast verification of your output HTML. Check out [our automated testing guide](/docs/testing#use-ruby-and-minitest-to-test-html-directly) for more info!