Update Dockerfile

Dockerfile

@@ -28,16 +28,20 @@ RUN apt-get update && apt-get install -y \
     liblist-moreutils-perl \
     libtry-tiny-perl \
     libdatetime-timezone-perl \
+    # Add 'debconf-utils' to allow us to pre-seed answers
+    debconf-utils \
     && rm -rf /var/lib/apt/lists/*
 
-# 2. Install KasmVNC (THE FIX)
-# We download the package first
+# 2. Install KasmVNC (THE NUCLEAR FIX)
 RUN wget https://github.com/kasmtech/KasmVNC/releases/download/v1.3.1/kasmvncserver_jammy_1.3.1_amd64.deb
 
-# We install it, but we pipe "2" into it to answer the question automatically if it asks.
-# We also use 'mkdir' to ensure the folder exists, preventing one class of errors.
-RUN mkdir -p /etc/kasmvnc && \
-    echo "2" | apt-get install -y ./kasmvncserver_*.deb || apt-get install -f -y && \
+# --- PRE-SEEDING ANSWERS ---
+# This block tells the system: "When kasmvncserver asks about 'daemon_user_write', answer 'false' (Option 2)"
+RUN echo "kasmvncserver kasmvncserver/daemon_user_write boolean false" | debconf-set-selections && \
+    echo "kasmvncserver kasmvncserver/default_user_write boolean false" | debconf-set-selections
+
+# Now we install, and it should see the answer is already there.
+RUN apt-get install -y ./kasmvncserver_*.deb || apt-get install -f -y && \
     rm kasmvncserver_*.deb
 
 # 3. Install Python libraries