Changes to be committed:

new file:   .gitignore
	modified:   Dockerfile
	modified:   README.md
	modified:   patches/calibre-web/optional-requirements.patch

README.md

@@ -7,4 +7,10 @@ Build the image on macOS with orbstack docker:
 docker build . --platform linux/amd64  --debug
 ```
 
-docker build . --no-cache --load --platform linux/amd64  2>&1 | tee build.log 
+```bash
+docker build . --no-cache --load --platform linux/amd64  2>&1 | tee build.log 
+```
+
+```bash
+diff -Naur <original_file> <new_file> > <patch_filename>.patch
+```