Fix: After a restart force link is required

Signed-off-by: Knut Ahlers <knut@ahlers.me>

docker-entrypoint.sh

@@ -1,7 +1,7 @@
 #!/usr/local/bin/dumb-init /bin/bash
 set -euxo pipefail
 
-ln dist/app.js app.js
+ln -f dist/app.js app.js
 korvike -i dist/index.html -o index.html
 
 exec python -m http.server 3000