I think it would be nice to explicitly mention the correct CURL commands for Windows. The guide only mentions differences in the escaping rules, but this is hard to directly apply.
For example, on Powershell with Windows Terminal the following would work:
curl -X POST "localhost:8080/employees" -H "Content-type:application/json" -d "{\`"name\`": \`"Samwise Gamgee\`", \`"role\`": \`"gardener\`"}"