Apply same dotnet fix to webdesktopk8s and improve validation

Co-authored-by: commjoen <[email protected]>

Author: Copilot

Dockerfile_webdesktop

@@ -32,6 +32,9 @@ RUN \
 
 WORKDIR /config/Desktop
 
+# Create directories for copied files
+RUN mkdir -p /var/tmp/wrongsecrets /var/tmp/wrongsecrets/decrypt
+
 COPY src/main/resources/executables/*linux-mus* /var/tmp/wrongsecrets/
 COPY src/main/resources/executables/decrypt/ /var/tmp/wrongsecrets/decrypt/
 COPY src/main/resources/executables/wrongsecrets-advanced-c-windows.exe /var/tmp/wrongsecrets/

Dockerfile_webdesktopk8s

@@ -26,11 +26,14 @@ RUN \
     echo "installing dotnet" && \
     wget https://dot.net/v1/dotnet-install.sh -O dotnet-install.sh && \
     chmod +x dotnet-install.sh && \
-    ./dotnet-install.sh --install-dir /etc/dotnet --version latest && \
+    ./dotnet-install.sh --install-dir /etc/dotnet --channel 6.0 --version latest && \
+    rm dotnet-install.sh && \
     export DOTNET_ROOT=/etc/dotnet && \
     export PATH="/etc/dotnet:/etc/dotnet/tools:$PATH" && \
-    dotnet --info && \
-    dotnet tool install ilspycmd --version 9.0.0.7889 --tool-path /etc/dotnet/tools
+    echo "Checking dotnet installation..." && \
+    /etc/dotnet/dotnet --info && \
+    echo "Installing ilspycmd..." && \
+    /etc/dotnet/dotnet tool install ilspycmd --version 9.0.0.7889 --tool-path /etc/dotnet/tools
 
 # Add a secret using --mount and write it to a specific file path for the challenge
 # Create the /app directory to store the secret