chore(dockerignore): update .dockerignore to include additional scripts

Include `prepare-config.sh` and `ssl-manager.sh` in the Docker build
context. These scripts are necessary for configuration preparation and
SSL management, respectively, and should not be ignored to ensure they
are available in the Docker image.

Author: kzndotsh

.dockerignore

@@ -20,6 +20,8 @@ scripts/
 !scripts/manage-modules.sh
 !scripts/module-config.sh
 !scripts/start-webpanel.sh
+!scripts/prepare-config.sh
+!scripts/ssl-manager.sh
 renovate.json
 .github/
 .vscode/