fix: use rust/golang runners (docker runner doesn't exist)

Available runners: rust, golang, node
Test job: runs-on rust with container rust:1-bookworm (modern glibc)
Build job: runs-on golang with container docker:27-cli (same as before)

.forgejo/workflows/build.yaml

@@ -13,7 +13,7 @@ env:
 jobs:
   test:
     name: Test
-    runs-on: docker
+    runs-on: rust
     container: rust:1-bookworm
     steps:
       - name: Install node (required by JS-based actions)
@@ -37,12 +37,15 @@ jobs:
 
   build:
     name: Build and push image
-    runs-on: docker
+    runs-on: golang
     needs: test
     if: github.event_name == 'push' && github.ref == 'refs/heads/main'
-    container: docker:27-cli
+    container:
+      image: docker:27-cli
+      volumes:
+        - /docker-certs/client:/docker-certs/client:ro
     env:
-      DOCKER_HOST: tcp://forgejo-runner-dind.cicd.svc.cluster.local:2376
+      DOCKER_HOST: tcp://localhost:2376
       DOCKER_TLS_VERIFY: "1"
       DOCKER_CERT_PATH: /docker-certs/client
     steps: