Bad substitution when running find . -type f command

[deffcolony]

The following command from the readme.md:
find . -type f -name 'example-*' -exec sh -c 'cp -rf "$0" "${0/example-/}"' {} \;

gave me the following error when running inside nitro-docker folder:

./example-.cms.env: 1: Bad substitution
./nitro/example-ui-config.json: 1: Bad substitution
./nitro/example-renderer-config.json: 1: Bad substitution

The solution:

This command will copy and removes example- from the files, and if the copy is successful, it will remove the original files.
find . -type f -name 'example-*' | while read -r file; do new_file=$(echo "$file" | sed 's/example-//'); cp -rf "$file" "$new_file" && rm "$file"; done

Advice

The command could be included inside the automated command list at readme.md:

git clone https://github.com/Gurkengewuerz/nitro-docker.git && \
cd nitro-docker/ && \
git clone https://git.krews.org/morningstar/arcturus-morningstar-default-swf-pack.git assets/swf/ && \
git clone https://github.com/krewsarchive/default-assets.git assets/assets/ && \
wget https://github.com/billsonnn/nitro-react/files/10334858/room.nitro.zip && \
unzip -o room.nitro.zip -d assets/assets/bundled/generic && \
find . -type f -name 'example-*' | while read -r file; do new_file=$(echo "$file" | sed 's/example-//'); cp -rf "$file" "$new_file" && rm "$file"; done
 && \
docker compose up db -d

Or... you could modify the existing command from readme.md at the top