fix docker build + change base image (#78)

Author: asmyasnikov

Dockerfile

@@ -11,7 +11,7 @@ COPY internal/ internal/
 
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -o manager cmd/ydb-kubernetes-operator/main.go
 
-FROM alpine:3.15
+FROM scratch
 WORKDIR /
 COPY --from=builder /workspace/manager .
 USER 65532:65532

internal/resources/storage.go

@@ -1,7 +1,6 @@
 package resources
 
 import (
-	"encoding/base64"
 	"fmt"
 
 	api "github.com/ydb-platform/ydb-kubernetes-operator/api/v1alpha1"