trying to fix docker image build.

docker/Dockerfile

@@ -8,8 +8,7 @@ COPY . /go/src/github.com/analogj/scrutiny
 RUN go mod vendor && \
     go build -o scrutiny webapp/backend/cmd/scrutiny/scrutiny.go && \
     go build -o scrutiny-collector-selftest collector/cmd/collector-selftest/collector-selftest.go && \
-    go build -o scrutiny-collector-metrics collector/cmd/collector-metrics/collector-metrics.go && \
+    go build -o scrutiny-collector-metrics collector/cmd/collector-metrics/collector-metrics.go
-    file
 
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 FROM debian:bullseye-slim as runtime