fix: sourcemaps for compiled flecks

packages/core/src/server/flecks.js

@@ -282,6 +282,7 @@ export default class ServerFlecks extends Flecks {
           ...babelmerge(...rcBabel.map(([, babel]) => babel)),
           ignore: [resolve(join(sourcepath, '..', 'node_modules'))],
           only: [resolve(join(sourcepath, '..'))],
+          sourceMaps: 'inline',
         };
         debug("require('@babel/register')(%O)", config);
         register({
@@ -328,6 +329,13 @@ export default class ServerFlecks extends Flecks {
               },
               '__non_webpack_require__',
             ],
+            [
+              'prepend',
+              {
+                prepend: "require('source-map-support/register');",
+              },
+              'source-map-support',
+            ],
           ],
         });
         compiling.forEach((fleck) => {