upgrade to go 1.26 (#2330)

Also upgrade actions for compatibility with 1.26

.github/workflows/build.yml

@@ -15,11 +15,11 @@ jobs:
     runs-on: "ubuntu-24.04"
     steps:
       - name: "checkout repository"
-        uses: "actions/checkout@v3"
+        uses: "actions/checkout@v6"
       - name: "setup go"
-        uses: "actions/setup-go@v3"
+        uses: "actions/setup-go@v6"
         with:
-          go-version: "1.25"
+          go-version: "1.26"
       - name: "install python3-pytest"
         run: "sudo apt install -y python3-pytest"
       - name: "make install"

.github/workflows/docker-image.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Git repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
 
       - name: Authenticate to container registry
         uses: docker/login-action@v2

Dockerfile

@@ -1,5 +1,5 @@
 ## build ergo binary
-FROM docker.io/golang:1.25-alpine3.22 AS build-env
+FROM docker.io/golang:1.26-alpine3.22 AS build-env
 
 RUN apk upgrade -U --force-refresh --no-cache && apk add --no-cache --purge --clean-protected -l -u make git
 

go.mod

@@ -1,6 +1,6 @@
 module github.com/ergochat/ergo
 
-go 1.25
+go 1.26
 
 require (
 	code.cloudfoundry.org/bytefmt v0.0.0-20200131002437-cf55d5288a48