Improve build script error handling and logging

- Added better logging for apt-get download command
- Create separate build_retry.log for retry attempts
- Improved error messages and log file management
- Better tracking of build process and ISO file detection

build.sh

@@ -46,16 +46,16 @@ else
     # Check if the error is about missing devuan-keyring
     if grep -q "Couldn't find these debs: devuan-keyring" build.log; then
         echo "Detected missing devuan-keyring. Downloading locally..."
-        if apt-get download devuan-keyring; then
+        if apt-get download devuan-keyring 2>&1 | tee -a build.log; then
             echo "devuan-keyring downloaded successfully. Retrying build..."
             rm -f build.log
-            lb build
+            lb build 2>&1 | tee build_retry.log
             if [ $? -eq 0 ]; then
                 echo "Build completed successfully!"
                 echo "ISO file: $(ls live-image-amd64.iso 2>/dev/null || ls *.iso 2>/dev/null || echo 'Not found')"
                 exit 0
             else
-                echo "Build failed again. Check the output above for errors."
+                echo "Build failed again. Check build_retry.log for errors."
                 exit 1
             fi
         else
@@ -63,7 +63,7 @@ else
             exit 1
         fi
     else
-        echo "Build failed. Check the output above for errors."
+        echo "Build failed. Check build.log for errors."
         exit 1
     fi
 fi
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