Update Dockerfile to Go 1.18

Signed-off-by: Stefan Prodan <[email protected]>

Author: stefanprodan

Dockerfile

@@ -1,4 +1,4 @@
-ARG GO_VERSION=1.17
+ARG GO_VERSION=1.18
 ARG XX_VERSION=1.1.0
 
 FROM --platform=$BUILDPLATFORM tonistiigi/xx:${XX_VERSION} AS xx
@@ -27,7 +27,7 @@ COPY controllers/ controllers/
 ENV CGO_ENABLED=0
 RUN xx-go build -a -o source-watcher main.go
 
-FROM alpine:3.15
+FROM alpine:3.16
 
 RUN apk add --no-cache ca-certificates tini