Improve Dockerfile

Author: ben221199

Dockerfile

@@ -1,9 +1,15 @@
-FROM golang:alpine
+FROM golang:alpine AS builder
 
 COPY . .
 
 RUN go build -o lbryd
 
+FROM alpine
+
+USER 1000
+
+COPY --from=builder lbryd .
+
 EXPOSE 4444/udp
 EXPOSE 5279
 EXPOSE 5280