integrate buildkitd in runner containers

gitea-runner/buildkitd/deployment.yaml

@@ -5,7 +5,7 @@ metadata:
   namespace: gitea-runner
 spec:
   progressDeadlineSeconds: 600
-  replicas: 3
+  replicas: 0
   revisionHistoryLimit: 10
   selector:
     matchLabels:

gitea-runner/statefulset.yaml

@@ -59,6 +59,19 @@ spec:
         volumeMounts:
           - mountPath: /certs
             name: docker-certs
+      - name: buildkitd
+        args:
+          - --addr
+          - tcp://0.0.0.0:1234
+        image: moby/buildkit:v0.27.1
+        imagePullPolicy: Always
+        ports:
+        - containerPort: 1234
+          protocol: TCP
+        securityContext:
+          privileged: true
+        terminationMessagePath: /dev/termination-log
+        terminationMessagePolicy: File
       dnsPolicy: ClusterFirst
       hostNetwork: true
       restartPolicy: Always