build: generate fingerprinted assets before compile

Dockerfile

@@ -15,6 +15,7 @@ COPY . .
 
 ENV CGO_ENABLED=1
 ENV CGO_CFLAGS="-D_LARGEFILE64_SOURCE"
+RUN go run ./cmd/genassets
 RUN go build -ldflags "-w -s" -o build/x-ui main.go
 RUN ./DockerInit.sh "$TARGETARCH"
 

README.md

@@ -30,6 +30,17 @@ bash <(curl -Ls https://raw.githubusercontent.com/Sora39831/3x-ui/master/install
 
 For full documentation, please visit the [project Wiki](https://github.com/Sora39831/3x-ui/wiki).
 
+## Building from source
+
+Generate fingerprinted frontend assets before compiling:
+
+```bash
+go run ./cmd/genassets
+go build -ldflags "-w -s" -o build/x-ui main.go
+```
+
+Production builds embed files from `web/public/assets` and `web/public/assets-manifest.json`.
+
 ## A Special Thanks to
 
 - [alireza0](https://github.com/alireza0/)

web/asset_manifest_test.go

@@ -85,3 +85,11 @@ func TestAssetRequestCacheControlDoesNotMarkMissingFingerprintPathImmutable(t *t
 		t.Fatalf("expected missing asset path to avoid immutable cache-control, got %q", got)
 	}
 }
+
+func TestAssetCacheControlForLogicalPathIsShortLived(t *testing.T) {
+	got := assetCacheControl("js/websocket.js")
+	want := "public, max-age=300"
+	if got != want {
+		t.Fatalf("expected %q, got %q", want, got)
+	}
+}