Bump required Go version to 1.18

.github/workflows/cicd.yml

@@ -24,7 +24,7 @@ jobs:
         restore-keys: ${{ runner.os }}-go-
     - uses: actions/setup-go@v2
       with:
-        go-version: 1.17.11
+        go-version: 1.18.9
     - name: "Verify build.sh"
       run: |
         ./build.sh

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.17-alpine AS build-env
+FROM golang:1.18-alpine AS build-env
 
 RUN set -ex && \
     apk upgrade --no-cache --available && \
@@ -14,7 +14,7 @@ RUN mkdir -p /pkg/data && \
     cp maddy.conf.docker /pkg/data/maddy.conf && \
     ./build.sh --builddir /tmp --destdir /pkg/ --tags docker build install
 
-FROM alpine:3.16.0
+FROM alpine:3.17.0
 LABEL maintainer="fox.cpp@disroot.org"
 LABEL org.opencontainers.image.source=https://github.com/foxcpp/maddy
 

docs/tutorials/building-from-source.md

@@ -6,12 +6,12 @@ You need C toolchain, Go toolchain and Make:
 
 On Debian-based system this should work:
 ```
-apt-get install golang-1.17 gcc libc6-dev make
+apt-get install golang-1.18 gcc libc6-dev make
 ```
 
 Additionally, if you want manual pages, you should also have scdoc installed.
 Figuring out the appropriate way to get scdoc is left as an exercise for
-reader (for Ubuntu 19.10 it is in repositories).
+reader (for Ubuntu 22.04 LTS it is in repositories).
 
 ## Recent Go toolchain
 
@@ -20,8 +20,8 @@ available in some distributions (*cough* Debian *cough*).
 
 It should not be hard to grab a recent built toolchain from golang.org:
 ```
-wget "https://dl.google.com/go/go1.17.11.linux-amd64.tar.gz"
-tar xf "go1.17.11.linux-amd64.tar.gz"
+wget "https://dl.google.com/go/go1.18.9.linux-amd64.tar.gz"
+tar xf "go1.18.19.linux-amd64.tar.gz"
 export GOROOT="$PWD/go"
 export PATH="$PWD/go/bin:$PATH"
 ```

go.mod

@@ -1,6 +1,6 @@
 module github.com/foxcpp/maddy
 
-go 1.17
+go 1.18
 
 require (
 	blitiri.com.ar/go/spf v1.5.1