docs: document payload migrate:create flags (#11592)

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#10978

Author: r1tsuu

docs/database/migrations.mdx

@@ -118,6 +118,10 @@ default, migrations will be named using a timestamp.
 npm run payload migrate:create optional-name-here
 ```
 
+Flags:
+* `--skip-empty`: with Postgres, it skips the "no schema changes detected. Would you like to create a blank migration file?" prompt which can be useful for generating migration in CI.
+* `--force-accept-warning`: accepts any command prompts, creates a blank migration even if there weren't any changes to the schema.
+
 ### Status
 
 The `migrate:status` command will check the status of migrations and output a table of which migrations have been run,