fix gitlab-ci.yml

.gitlab-ci.yml

 stages:
+  - setup
   - test
   - build
-  - deploy
+
+go_setup:
+  stage: setup
+  tags:
+    - linux
+  script:
+    - wget https://go.dev/dl/go1.17.6.linux-amd64.tar.gz
+    - tar -xzf go1.17.6.linux-amd64.tar.gz
+    - export PATH=$PATH:$(pwd)/go/bin
+    - go version
 
 go_test:
   stage: test
   tags:
     - linux
   script: go test
+  dependencies:
+    - go_setup
 
 go_build:
   stage: build
   tags:
     - linux
   script: go build
+  dependencies:
+    - go_setup