ci: add devshell with Node.js for forgejo actions

.forgejo/workflows/check.yml

@@ -5,6 +5,10 @@ jobs:
   Check:
     runs-on: self-hosted
     steps:
+      - name: Enter ci devshell
+        run: |
+          nix --accept-flake-config --access-tokens '' develop .#ci
+
       - name: Check out repository code
         uses: https://code.forgejo.org/actions/checkout@v4
 

flake.nix

@@ -91,6 +91,11 @@
               jq
             ];
           };
+          devShells.ci = pkgs.mkShell {
+            buildInputs = with pkgs; [
+              nodejs
+            ];
+          };
         };
 
       flake =