Update Dockerfile

Dockerfile

@@ -3,8 +3,8 @@ FROM ubuntu:20.04
 # Set the DEBIAN_FRONTEND to noninteractive to avoid interactive prompts during package installation
 ENV DEBIAN_FRONTEND=noninteractive
 
-# Install necessary packages and configure the timezone non-interactively
-RUN apt-get update && apt-get install -y \
+# Update package lists and install necessary packages, with --fix-missing option
+RUN apt-get update && apt-get install -y --fix-missing \
     tzdata \
     x11vnc \
     xvfb \