From 13a99d4d34b7a699e5162810e5ebf7efb345661d Mon Sep 17 00:00:00 2001
From: Lizandro Guarnizo <77708265+lizandrogd@users.noreply.github.com>
Date: Thu, 2 Jul 2026 14:48:05 -0500
Subject: [PATCH] fix(cache): disable service worker to prevent stale cache on
 mobile

Flutter's PWA service worker caches the entire app shell aggressively,
causing users to see old versions even after deploys. Disabling it lets
nginx cache headers take effect. Also unregisters any existing service
worker already installed on user devices.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 Dockerfile     | 2 +-
 web/index.html | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index c6bf0cc..428ce58 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,7 +6,7 @@ COPY pubspec.yaml pubspec.lock ./
 RUN flutter pub get
 
 COPY . .
-RUN flutter build web --release --base-href /
+RUN flutter build web --release --base-href / --pwa-strategy=none
 
 # Stage 2: Serve with nginx
 FROM nginx:alpine
diff --git a/web/index.html b/web/index.html
index 9564528..61dd985 100644
--- a/web/index.html
+++ b/web/index.html
@@ -89,6 +89,15 @@
     });
   </script>
 
+  <script>
+    // Unregister any previously installed service worker so stale cache is cleared
+    if ('serviceWorker' in navigator) {
+      navigator.serviceWorker.getRegistrations().then(function(regs) {
+        regs.forEach(function(r) { r.unregister(); });
+      });
+    }
+  </script>
+
   <script>
     // Force cache busting: append build timestamp so stale JS/CSS is never reused
     var _v = new Date().getTime();