feat: Use container for the API service

app/src/services/data_transformer/OpenfoodfactsDataTransformer.ts

@@ -0,0 +1,25 @@
+import { Transform } from "node:stream";
+
+type OpenfoodfactsData = {
+  code: string;
+  countries_en: string;
+};
+
+export default class OpenfoodfactsDataTransformer extends Transform {
+  constructor() {
+    super({ objectMode: true });
+  }
+
+  _transform(chunk: OpenfoodfactsData, encoding: string, callback: () => void) {
+    const { code, countries_en } = chunk;
+
+    if (code && countries_en) {
+      this.push({
+        "Barcode (EAN 13)": code,
+        Country: countries_en,
+      });
+    }
+
+    callback();
+  }
+}