feat: use go:embed to embed templates (#1756)

tools/goctl/docker/docker.tpl

@@ -0,0 +1,32 @@
+FROM golang:{{.Version}}alpine AS builder
+
+LABEL stage=gobuilder
+
+ENV CGO_ENABLED 0
+{{if .Chinese}}ENV GOPROXY https://goproxy.cn,direct
+{{end}}{{if .HasTimezone}}
+RUN apk update --no-cache && apk add --no-cache tzdata
+{{end}}
+WORKDIR /build
+
+ADD go.mod .
+ADD go.sum .
+RUN go mod download
+COPY . .
+{{if .Argument}}COPY {{.GoRelPath}}/etc /app/etc
+{{end}}RUN go build -ldflags="-s -w" -o /app/{{.ExeFile}} {{.GoRelPath}}/{{.GoFile}}
+
+
+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}}
+ENV TZ {{.Timezone}}
+{{end}}
+WORKDIR /app
+COPY --from=builder /app/{{.ExeFile}} /app/{{.ExeFile}}{{if .Argument}}
+COPY --from=builder /app/etc /app/etc{{end}}
+{{if .HasPort}}
+EXPOSE {{.Port}}
+{{end}}
+CMD ["./{{.ExeFile}}"{{.Argument}}]