Add etag for immutable assets

README.md

@@ -37,12 +37,12 @@ pnpm run start
 Or, if you prefer to use a container:
 
 ```sh
-docker run -d -p 3000:3000 ghcr.io/coracle-social/flotilla:latest
+docker run -d -p 3000:3000 gitea.coracle.social/coracle/flotilla:latest
 ```
 
 Alternatively, you can copy the build files into a directory of your choice and serve it yourself:
 
 ```sh
 mkdir ./mount
-docker run -v ./mount:/app/mount ghcr.io/coracle-social/flotilla:latest bash -c 'cp -r build/* mount'
+docker run -v ./mount:/app/mount gitea.coracle.social/coracle/flotilla:latest bash -c 'cp -r build/* mount'
 ```

server.js

@@ -247,6 +247,14 @@ app.use(
             : "public, max-age=3600"
 
       context.header("Cache-Control", cacheControl)
+
+      // Immutable assets are content-hashed by Vite, so the filename is itself a
+      // stable content identifier. Exposing it as an ETag lets clients that
+      // revalidate explicitly (e.g. emoji-picker-element checks its data source
+      // on every load) skip re-downloading large files when nothing changed.
+      if (isImmutable) {
+        context.header("ETag", `"${path.basename(filePath)}"`)
+      }
     },
   }),
 )