docker: upgrade docker image

Signed-off-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>

Author: vincenzopalazzo

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:alpine3.16
+FROM golang:alpine3.19
 LABEL maintainer="Vincenzo Palazzo (@vincenzopalazzo) vincenzopalazzodev@gmail.com"
 
 workdir lnlambda
@@ -7,4 +7,4 @@ COPY . .
 
 RUN go get -d ./...
 
-CMD [ "go", "run", "main.go" ]
+CMD [ "go", "run", "main.go" ]