fix: update Dockerfile to remove unnecessary sudo command for user modification

Dockerfile

@@ -13,7 +13,7 @@ LABEL url="https://github.com/JSchmie/ScrAIbe"
 
 # Set up a new user named "hyathi" with user ID 1000
 RUN useradd -m -u 1000 hyathi
-RUN sudo usermod -aG sudo hyathi
+RUN usermod -aG sudo hyathi
 
 # Install sudo and add user to sudoers group
 RUN apt update -y && apt install -y sudo