Update Dockerfile

Dockerfile

@@ -7,11 +7,11 @@ ENV DEBIAN_FRONTEND=noninteractive \
 
 # Install Git, Python 3.9, and required packages
 RUN apt-get update && \
-    apt-get install -y git python3 python3-dev python3-pip wget libgl1-mesa-glx && \
+    apt-get install -y git python3.9 python3.9-dev python3-pip wget libgl1-mesa-glx && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/* && \
     wget https://bootstrap.pypa.io/get-pip.py && \
-    python3 get-pip.py && \
+    python3.9 get-pip.py && \ 
     rm get-pip.py
     
 # Set up a new user named "user" with user ID 1000