fix: adding missing docker login

Author: benjivesterby

.github/workflows/nix.yml

@@ -81,6 +81,13 @@ jobs:
           oauth-secret: ${{ secrets.TS_OAUTH_SECRET }}
           tags: tag:ci
 
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
       - uses: actions/cache@v4
         with:
           path: |
@@ -91,7 +98,7 @@ jobs:
             ${{ runner.os }}-go-
 
       - name: Run Command
-        run: nix develop --accept-flake-config --command ${{ inputs.command }}
+        run: ${{ inputs.command }}
 
       - name: Upload Test Coverage
         uses: actions/upload-artifact@v4