build fixes

app/craco.config.js

@@ -1,5 +1,6 @@
 const cracoWasm = require("craco-wasm");
 const webpack = require("webpack");
+const path = require("path");
 
 module.exports = {
   plugins: [
@@ -26,12 +27,17 @@ module.exports = {
         fallback: {
           buffer: require.resolve("buffer"),
         },
+        alias: {
+          '@ffmpeg/ffmpeg': path.resolve(__dirname, 'src/stub.js')
+        },
       },
       plugins: [
         new webpack.ProvidePlugin({
           Buffer: ["buffer", "Buffer"],
         }),
       ],
+      ignoreWarnings: [/Failed to parse source map/],
+      cache: false,
     },
   },
 }