chore: format Dockerfile template (#4496)

Author: kevwan

tools/goctl/docker/docker.tpl

@@ -4,10 +4,12 @@ LABEL stage=gobuilder
 
 ENV CGO_ENABLED 0
 {{if .Chinese}}ENV GOPROXY https://goproxy.cn,direct
+
 RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.aliyun.com/g' /etc/apk/repositories
-{{end}}{{if .HasTimezone}}
+{{- end}}{{if .HasTimezone}}
 RUN apk update --no-cache && apk add --no-cache tzdata
-{{end}}
+{{- end}}
+
 WORKDIR /build
 
 ADD go.mod .
@@ -21,14 +23,15 @@ RUN go build -ldflags="-s -w" -o /app/{{.ExeFile}} {{.GoMainFrom}}
 FROM {{.BaseImage}}
 
 COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
-{{if .HasTimezone}}COPY --from=builder /usr/share/zoneinfo/{{.Timezone}} /usr/share/zoneinfo/{{.Timezone}}
+{{if .HasTimezone -}}
+COPY --from=builder /usr/share/zoneinfo/{{.Timezone}} /usr/share/zoneinfo/{{.Timezone}}
 ENV TZ {{.Timezone}}
 {{end}}
 WORKDIR /app
 COPY --from=builder /app/{{.ExeFile}} /app/{{.ExeFile}}
-{{if .Argument}}COPY {{.GoRelPath}}/etc /app/etc
-{{end}}
-
+{{if .Argument -}}
+COPY {{.GoRelPath}}/etc /app/etc
+{{- end}}
 {{if .HasPort}}
 EXPOSE {{.Port}}
 {{end}}