Update "g secret" docs for yarn v3

[Tobbe]

The command to append a secret key to your .env file is this, for yarn v1:

echo "SESSION_SECRET=$(yarn --silent rw g secret --raw)" >> .env

For yarn v3 they have removed the --silent flag, and if you try to add it you get 50+ lines of "help"

$ yarn --silent rw g secret
Unknown Syntax Error: Command not found; did you mean one of:

  0. yarn cache clean [--mirror] [--all]
  1. yarn cache clean [--mirror] [--all]
  2. yarn config get [--json] [--no-redacted] <name>
  3. yarn config set [--json] [-H,--home] <name> <value>
  4. yarn config unset [-H,--home] <name>
  5. yarn set resolution [-s,--save] <descriptor> <resolution>
  6. yarn set version from sources [--path #0] [--repository #0] [--branch #0] [--plugin #0] [--no-minify] [-f,--force] [--skip-plugins]
  7. yarn set version [--only-if-needed] <version>
  8. yarn workspaces list [--since] [-R,--recursive] [-v,--verbose] [--json]
  9. yarn --clipanion=definitions
 10. yarn help
 11. yarn help
 12. yarn help
 13. yarn <leadingArgument> ...
 14. yarn -v
 15. yarn -v
 16. yarn bin [-v,--verbose] [--json] [name]
 17. yarn config [-v,--verbose] [--why] [--json]
 18. yarn dedupe [-s,--strategy #0] [-c,--check] [--json] [--mode #0] ...
 19. yarn exec <commandName> ...
 20. yarn explain peer-requirements [hash]
 21. yarn explain [--json] [code]
 22. yarn info [-A,--all] [-R,--recursive] [-X,--extra #0] [--cache] [--dependents] [--manifest] [--name-only] [--virtuals] [--json] ...
 23. yarn install [--json] [--immutable] [--immutable-cache] [--check-cache] [--inline-builds] [--mode #0]
 24. yarn link [-A,--all] [-p,--private] [-r,--relative] <destination>
 25. yarn unlink [-A,--all] ...
 26. yarn node ...
 27. yarn plugin import from sources [--path #0] [--repository #0] [--branch #0] [--no-minify] [-f,--force] <name>
 28. yarn plugin import <name>
 29. yarn plugin remove <name>
 30. yarn plugin list [--json]
 31. yarn plugin runtime [--json]
 32. yarn rebuild ...
 33. yarn remove [-A,--all] [--mode #0] ...
 34. yarn run
 35. yarn up [-i,--interactive] [-E,--exact] [-T,--tilde] [-C,--caret] [-R,--recursive] [--mode #0] ...
 36. yarn why [-R,--recursive] [--json] [--peers] <package>
 37. yarn workspace <workspaceName> <commandName> ...
 38. yarn create [-p,--package #0] [-q,--quiet] <command> ...
 39. yarn dlx [-p,--package #0] [-q,--quiet] <command> ...
 40. yarn init [-p,--private] [-w,--workspace] [-i,--install]
 41. yarn npm audit [-A,--all] [-R,--recursive] [--environment #0] [--json] [--severity #0]
 42. yarn npm info [-f,--fields #0] [--json] ...
 43. yarn npm login [-s,--scope #0] [--publish]
 44. yarn npm logout [-s,--scope #0] [--publish] [-A,--all]
 45. yarn npm publish [--access #0] [--tag #0] [--tolerate-republish] [--otp #0]
 46. yarn npm tag add <package> <tag>
 47. yarn npm tag list [--json] [package]
 48. yarn npm tag remove <package> <tag>
 49. yarn npm whoami [-s,--scope #0] [--publish]
 50. yarn pack [--install-if-needed] [-n,--dry-run] [--json] [-o,--out #0]
 51. yarn patch-commit [-s,--save] <patchFolder>
 52. yarn patch [--json] <package>
 53. yarn unplug [-A,--all] [-R,--recursive] [--json] ...

While running --silent rw g secret

Thankfully yarn3's default behavior is what you used to get with --silent. So we can just skip the flag

echo "SESSION_SECRET=$(yarn rw g secret --raw)" >> .env

This PR mentions both the yarn1 and yarn3 variants. We can remove the v1 version when/if we decide to only support yarn v3

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