Update Dockerfile

Dockerfile

@@ -6,9 +6,11 @@ ENV NB_USER jovyan
 ENV NB_UID 1000
 ENV HOME /home/${NB_USER}
 ENV JAVA_HOME /usr/lib/jvm/java-17-openjdk-amd64/
+ENV DEBIAN_FRONTEND=noninteractive
+ENV TZ=Etc/UTC
 
 # Install required packages
-RUN DEBIAN_FRONTEND=noninteractive apt-get update && apt-get install -y \
+RUN apt-get update && apt-get install -y --no-install-recommends \
     tar \
     wget \
     bash \
@@ -33,8 +35,8 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get update && apt-get install -y \
 
 # Install Python 3.11 (latest stable version)
 RUN add-apt-repository ppa:deadsnakes/ppa \
-    && DEBIAN_FRONTEND=noninteractive apt-get update \
-    && apt-get install -y python3.11 python3.11-venv python3.11-dev python3-pip \
+    && apt-get update \
+    && apt-get install -y --no-install-recommends python3.11 python3.11-venv python3.11-dev python3-pip \
     && apt-get clean
 
 # Set up JAVA_HOME