docs: howto create patches

- Commands to create patches for kubevirt or cdi

Signed-off-by: Ivan Mikheykin <[email protected]>

docs/internal/patches.md

@@ -0,0 +1,24 @@
+### Howto create patches for kubectl and cdi
+
+1. Checkout kubevirt (or cdi) along with virtualization-controller. Use `$version` from werf.inc.yaml:
+```shell
+$ pwd
+/home/user/virtualization-controller
+$ cd ..
+$ git checkout github.com/kubevirt/kubevirt kubevirt
+$ git clone --branch v1.0.0 https://github.com/kubevirt/kubevirt.git kubevirt
+```
+
+2. Make changes in kubevirt directory.
+
+3. Create patch:
+```shell
+$ cd kubevirt
+$ git diff > ../virtualization-controller/images/virt-artifact/patches/my-precious-override.patch
+```
+
+4. Add a new file before pushing:
+```shell
+$ cd ../virtualization-controller
+$ git add images/virt-artifact/patches/my-precious-override.patch
+```