chore(deps): update all dependencies on docker

Author: renovate[bot]

cmd/emtectl/Dockerfile

@@ -1,5 +1,5 @@
 ### builder ###
-FROM golang:1.20 as builder
+FROM golang:1.23 as builder
 WORKDIR /workspace
 COPY go.mod go.mod
 COPY go.sum go.sum
@@ -13,7 +13,7 @@ RUN --mount=type=cache,target=/go/pkg/mod \
   -ldflags "-s -w" -tags osusergo,netgo -a -o emtectl ./cmd/emtectl
 
 ### runner ###
-FROM alpine:3.18
+FROM alpine:3.21
 
 LABEL org.opencontainers.image.authors="Shota Kitazawa, Kohei Ota"
 LABEL org.opencontainers.image.url="https://github.com/cloudnativedaysjp/emtec-ecu"

cmd/server/Dockerfile

@@ -1,5 +1,5 @@
 ### builder ###
-FROM golang:1.20 as builder
+FROM golang:1.23 as builder
 WORKDIR /workspace
 COPY go.mod go.mod
 COPY go.sum go.sum