Try building go with ko

.forgejo/workflows/demo.yaml

@@ -1,6 +1,17 @@
-on: [push]
+on:
+  push:
+  pull_request:
+    types: [opened, synchronize, reopened]
 jobs:
   test:
     runs-on: docker
     steps:
+      - uses: https://code.forgejo.org/actions/checkout@v4
+      - uses: https://github.com/actions/setup-go@v5
+        with:
+          go-version: '1.22.4'
       - run: echo All Good
+      - uses: https://github.com/ko-build/setup-ko@v0.7
+      - run: ko build
+        env:
+          KO_DOCKER_REPO: ko.local

go.mod

@@ -0,0 +1,3 @@
+module testgo
+
+go 1.22.4

main.go

@@ -0,0 +1,9 @@
+package main
+
+import (
+	"fmt"
+)
+
+func main() {
+	fmt.Println("hello")
+}