Add cdn-cache-control header

Author: AndrewBarba

Plugins/VercelPackager/VercelOutput.swift

@@ -515,7 +515,7 @@ extension VercelOutput {
         let buildOutputPath = Path(buildPathOutput.replacingOccurrences(of: "/workspace", with: context.package.directory.string))
 
         // build the product
-        let buildCommand = "swift build -c release --product \(product.name) --static-swift-stdlib"
+        let buildCommand = "swift build -c release -Xswiftc -Osize --product \(product.name) --static-swift-stdlib"
         try Shell.execute(
             executable: dockerToolPath,
             arguments: [

Sources/Vercel/Types.swift

@@ -71,6 +71,7 @@ public enum HTTPHeaderKey: String, Sendable {
     case age = "age"
     case authorization = "authorization"
     case cacheControl = "cache-control"
+    case cdnCacheControl = "cdn-cache-control"
     case connection = "connection"
     case contentDisposition = "content-disposition"
     case contentEncoding = "content-encoding"
@@ -105,6 +106,7 @@ public enum HTTPHeaderKey: String, Sendable {
     case upgrade = "upgrade"
     case userAgent = "user-agent"
     case vary = "vary"
+    case vercelCdnCacheControl = "vercel-cdn-cache-control"
     case via = "via"
     case xCache = "x-cache"
     case xCacheHits = "x-cache-hits"