Dockerfile: upgrade to Go 1.17 (ethereum#23465)

Author: fjl

Dockerfile

@@ -4,7 +4,7 @@ ARG VERSION=""
 ARG BUILDNUM=""
 
 # Build Geth in a stock Go builder container
-FROM golang:1.16-alpine as builder
+FROM golang:1.17-alpine as builder
 
 RUN apk add --no-cache gcc musl-dev linux-headers git
 

Dockerfile.alltools

@@ -4,7 +4,7 @@ ARG VERSION=""
 ARG BUILDNUM=""
 
 # Build Geth in a stock Go builder container
-FROM golang:1.16-alpine as builder
+FROM golang:1.17-alpine as builder
 
 RUN apk add --no-cache gcc musl-dev linux-headers git