fix minifying and reuse code

Dockerfile

@@ -109,9 +109,11 @@ RUN if [ -f dist-clients/BackstageCapture.x64.dll ]; then \
       echo "WARNING: BackstageCapture DLL not available (build with MSVC on Windows)"; \
     fi
 
-# Tailwind CSS, vendored frontend assets, and bundled Bun server runtime.
-RUN bun run build \
-    && bun run minify \
+# Tailwind CSS, vendored frontend assets, minified public assets, and bundled Bun server runtime.
+RUN bun run build:public:prod \
+    && bun run build:bundle \
+    && test "$(wc -l < ./public/index.html)" -lt 20 \
+    && test "$(wc -l < ./public/assets/main.js)" -lt 50 \
     && test -s ./public/assets/tailwind.css \
     && test -d ./public/vendor/fontawesome \
     && test -s ./dist/index.js \