Update Dockerfiles

Use Alpine 3.18 and Go 1.20

Author: dhui

Diff for: Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.19-alpine3.16 AS builder
+FROM golang:1.20-alpine3.18 AS builder
 ARG VERSION
 
 RUN apk add --no-cache git gcc musl-dev make
@@ -15,7 +15,7 @@ COPY . ./
 
 RUN make build-docker
 
-FROM alpine:3.16
+FROM alpine:3.18
 
 RUN apk add --no-cache ca-certificates
 

Diff for: Dockerfile.github-actions

@@ -1,4 +1,4 @@
-FROM alpine:3.16
+FROM alpine:3.18
 
 RUN apk add --no-cache ca-certificates