build(deps): Update alpine Docker tag to v3.15 (#206)

* Update alpine Docker tag to v3.15

Signed-off-by: Renovate Bot <[email protected]>

* Downgrade to go 1.16 in Dockerfile

Signed-off-by: Christian Kreuzberger <[email protected]>

Co-authored-by: Renovate Bot <[email protected]>
Co-authored-by: Christian Kreuzberger <[email protected]>

Author: 3 people

Dockerfile

@@ -1,7 +1,7 @@
 # Use the offical Golang image to create a build artifact.
 # This is based on Debian and sets the GOPATH to /go.
 # https://hub.docker.com/_/golang
-FROM golang:1.17-alpine3.14 as builder
+FROM golang:1.16.2-alpine as builder
 RUN apk add --no-cache gcc libc-dev git
 
 ARG version=develop
@@ -35,7 +35,7 @@ RUN CGO_ENABLED=0 GOOS=linux go build -ldflags '-linkmode=external' $BUILDFLAGS
 
 # Use a Docker multi-stage build to create a lean production image.
 # https://docs.docker.com/develop/develop-images/multistage-build/#use-multi-stage-builds
-FROM alpine:3.14
+FROM alpine:3.15
 # Install extra packages
 # See https://github.com/gliderlabs/docker-alpine/issues/136#issuecomment-272703023