Debug CI x3

.forgejo/workflows/build.yml

@@ -5,7 +5,12 @@ jobs:
     container:
       image: golang:latest
     steps:
-      - run: ls && go build -x -v -o=stbackend -buildvcs=true ./cmd/stbackend/main.
+      - uses: actions/checkout@v4
+      - name: Setup go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: '/workspace/ScheduleTogether/Backend/go.mod'
+      - run: go build -x -v -o=stbackend -buildvcs=true ./cmd/stbackend/main.go
 
       - uses: actions/upload-artifact@v3
         with: