Add a forgejo workflow

.forgejo/workflows/build.yaml

@@ -6,14 +6,11 @@ jobs:
       image: golang:alpine
     steps:
       - uses: actions/checkout@v4
-        name: Checkout and build
-        run: |
-          apk add --no-cache git
+      - run: |
           go generate
           go build cmd/server.go -o spaceapi
 
       - uses: actions/upload-artifact@v2
-        name: Upload artifact
         with:
           name: spaceapi
           path: spaceapi