fix: add init container to wait for dind before starting runner

runner/deployment.yaml

@@ -13,6 +13,15 @@ spec:
       labels:
         app: gitea-runner
     spec:
+      initContainers:
+        - name: wait-for-dind
+          image: docker:cli
+          command: ["sh", "-c", "until docker info > /dev/null 2>&1; do echo 'waiting for dind...'; sleep 2; done"]
+          env:
+            - name: DOCKER_HOST
+              value: tcp://localhost:2375
+            - name: DOCKER_TLS_VERIFY
+              value: "0"
       containers:
         - name: runner
           image: gitea/act_runner:latest