Add a forgejo workflow

.forgejo/workflows/build.yaml

@@ -6,12 +6,14 @@ jobs:
       image: golang:alpine
     steps:
       - uses: actions/checkout@v4
+        name: Checkout and build
         run: |
           apk add --no-cache git
           go generate
           go build cmd/server.go -o spaceapi
 
       - uses: actions/upload-artifact@v2
+        name: Upload artifact
         with:
           name: spaceapi
           path: spaceapi