Fix contributing

Author: berewt

CONTRIBUTING.md

@@ -8,9 +8,15 @@
       - `nix/sources.json`
       - `nix/pkgs/haskell/sha256map.nix`
       - `cabal.project`
-  3. Copy over most of https://github.com/input-output-hk/plutus-apps/blob/main/cabal.project into `cabal.project`
-  4. Copy over the `sha256map` values from https://github.com/input-output-hk/plutus-apps/blob/main/nix/pkgs/haskell/sha256map.nix into `nix/pkgs/haskell/sha256map.nix` (but leave the first line that you just changed in step 2). To get the right hash value for `plutus-apps`, change one digit, then run `nix-shell`. You will get an error that shows the correct hash.
-  5. It’s likely that the code for the guessing game needs to be changed; luckily, you can copy the source from https://github.com/input-output-hk/plutus-apps/blob/main/plutus-playground-server/usecases/Game.hs roughly, and it should work.
+  3. Copy over most of https://github.com/input-output-hk/plutus-apps/blob/main/cabal.project into
+     `cabal.project`.
+  4. Copy over the `sha256map` values from
+     https://github.com/input-output-hk/plutus-apps/blob/main/nix/pkgs/haskell/sha256map.nix into
+     `nix/pkgs/haskell/sha256map.nix` (but leave the first line that you just changed in step 2).
+     To get the right hash value for `plutus-apps`, change one digit, then run `nix develop`.
+     You will get an error that shows the correct hash.
+  5. It’s likely that the code for the guessing game needs to be changed;
+     the example is not sync with plutus-apps anymore, so it has to be fixed locally.
   6. Test the different parts:
       - VSCode
           * You need to make sure to rebuild the image