Update Dockerfile

Dockerfile

@@ -20,7 +20,7 @@ RUN useradd -m -u 1000 user
 WORKDIR /home/user/app
 
 # Download the GGUF model file directly from Hugging Face Hub.
-RUN wget https://huggingface.co/${MODEL_REPO}/resolve/main/${MODEL_FILENAME} -O ${MODEL_FILENAME}
+RUN wget "https://huggingface.co/unsloth/gemma-3-4b-it-qat-GGUF/resolve/main/gemma-3-4b-it-qat-Q4_K_M.gguf?download=true" -O ${MODEL_FILENAME}
 
 # Copy the application files and set the correct ownership to the new user. [1]
 COPY --chown=user:user Modelfile .