Update Dockerfile

Dockerfile

@@ -6,7 +6,13 @@ ENV DEBIAN_FRONTEND=noninteractive
 ENV USER root
 
 # Install required packages
-RUN apt-get update && apt-get install -y \
+RUN apt-get update && \
+    apt-get upgrade -y && \
+    apt-get install -y \
+    apt-utils && \
+    apt-get install -f && \
+    dpkg --configure -a && \
+    apt-get install -y \
     supervisor \
     xfce4 \
     xfce4-terminal \
@@ -14,7 +20,9 @@ RUN apt-get update && apt-get install -y \
     net-tools \
     tigervnc-standalone-server \
     wget \
-    xterm
+    xterm && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
 
 # Install noVNC
 RUN wget https://github.com/novnc/noVNC/archive/refs/tags/v1.2.0.tar.gz \