Add content type to registry using filenames

registry/src/http/raw.ts

@@ -4,6 +4,7 @@ import {
    extractPackagePath,
    getAbsolutePackageVersion,
    getFile,
+   getContentType,
 } from "../utils.ts";
 import db from "../db.ts";
 
@@ -54,6 +55,8 @@ export default function raw(g: ABC.Group) {
       if (!result) return E404();
 
       ctx.response.headers.set("e-tag", result.etag);
+      let contentType = getContentType(filepath);
+      if (contentType) ctx.response.headers.set("Content-Type", contentType);
       return result.data;
    });
 }