Fixed dockerfile

Author: tuteng

.github/workflows/release.yml

@@ -10,7 +10,7 @@ env:
 
 jobs:
   goreleaser:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - name: Set up Go
         uses: actions/setup-go@v2

filebeat/Dockerfile

@@ -1,3 +1,4 @@
 FROM elastic/filebeat:7.17.5
 
-COPY --from=build-env /go/bin/filebeat /usr/share/filebeat/
+USER root
+COPY dist/filebeat_linux_amd64_v1/beat /usr/share/filebeat