fix: copy public folder to production docker image stage to serve APK downloads

backend/Dockerfile

@@ -33,6 +33,7 @@ COPY package*.json ./
 COPY --from=build /usr/src/app/node_modules ./node_modules
 COPY --from=build /usr/src/app/dist ./dist
 COPY --from=build /usr/src/app/prisma ./prisma
+COPY --from=build /usr/src/app/public ./public
 
 EXPOSE 3001
 CMD ["node", "dist/src/main.js"]

frontend/src/pages/LandingPage.tsx

@@ -445,7 +445,6 @@ export const LandingPage: React.FC<LandingPageProps> = ({
 
       // 3. Tải ảnh lên
       const formData = new FormData();
-      formData.append('images', pendingPhotoFile);
       if (pendingPhotoLocation) {
         formData.append('latitude', pendingPhotoLocation.latitude.toString());
         formData.append('longitude', pendingPhotoLocation.longitude.toString());
@@ -454,6 +453,7 @@ export const LandingPage: React.FC<LandingPageProps> = ({
       if (selectedTags.length > 0) {
         formData.append('tags', JSON.stringify(selectedTags));
       }
+      formData.append('images', pendingPhotoFile);
 
       let uploadRes = await fetch('/api/v1/photos/upload-anonymous', {
         method: 'POST',