Update golang Docker tag to v1.22

.woodpecker.yml

@@ -1,8 +1,11 @@
-steps:
+pipeline:
   build:
     image: docker
+    environment:
+      - DOCKER_HOST=tcp://docker:2375
     commands:
       - apk add curl
+      - sleep 5 # wait for docker service to come up
       - docker login -u $DOCKER_USERNAME -p $DOCKER_PASSWORD registry.yetaga.in
       - docker build -t registry.yetaga.in/castor:latest .
       - docker push registry.yetaga.in/castor:latest
@@ -11,5 +14,10 @@ steps:
     secrets: [docker_username, docker_password, compose_token]
     when:
       branch: "master"
-    volumes:
-      - /var/run/docker.sock:/var/run/docker.sock
+
+services:
+  docker:
+    image: docker:18.09-dind
+    privileged: true
+    when:
+      branch: master

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.21 as builder
+FROM golang:1.22 as builder
 COPY . /castor
 RUN cd /castor && CGO_ENABLED=0 go build