Automatically remove the container when it exits

Without --rm option, it leaves a lot of stopped containers for a big project.

check.sh

@@ -21,9 +21,9 @@ format_diff() {
 	local filepath="$1"
 	# Invoke clang-format with dry run and formatting error output
 	if [[ $CLANG_FORMAT_VERSION -gt "9" ]]; then
-		local_format="$(docker run -i -v "$(pwd)":"$(pwd)" -w "$(pwd)" ghcr.io/jidicula/clang-format:"$CLANG_FORMAT_VERSION" -n --Werror --style=file --fallback-style="$FALLBACK_STYLE" "${filepath}")"
+		local_format="$(docker run -i -v "$(pwd)":"$(pwd)" -w "$(pwd)" --rm ghcr.io/jidicula/clang-format:"$CLANG_FORMAT_VERSION" -n --Werror --style=file --fallback-style="$FALLBACK_STYLE" "${filepath}")"
 	else # Versions below 9 don't have dry run
-		formatted="$(docker run -i -v "$(pwd)":"$(pwd)" -w "$(pwd)" ghcr.io/jidicula/clang-format:"$CLANG_FORMAT_VERSION" --style=file --fallback-style="$FALLBACK_STYLE" "${filepath}")"
+		formatted="$(docker run -i -v "$(pwd)":"$(pwd)" -w "$(pwd)" --rm ghcr.io/jidicula/clang-format:"$CLANG_FORMAT_VERSION" --style=file --fallback-style="$FALLBACK_STYLE" "${filepath}")"
 		local_format="$(diff -q <(cat "${filepath}") <(echo "${formatted}"))"
 	fi