update to Go 1.13

.gitlab-ci.yml

@@ -13,6 +13,7 @@ variables:
   RABBITMQ_DEFAULT_PASS: villas
   AMQPURL: 'amqp://villas:villas@rabbitmq:5672'
   PORT: 4000
+  GO_IMAGE: golang:1.13-buster
 
 stages:
   - build
@@ -26,7 +27,7 @@ build:backend:
   stage: build
   tags:
     - docker
-  image: golang:1.12.9-buster
+  image: ${GO_IMAGE}
   script:
     - go mod tidy
     - go install github.com/swaggo/swag/cmd/swag
@@ -59,7 +60,7 @@ test:gotest:
     MODE: test
   tags:
     - docker
-  image: golang:1.12.9-buster
+  image: ${GO_IMAGE}
   script:
     - go mod tidy
     - go test $(go list ./... )
@@ -81,7 +82,7 @@ test:database:
     DB_PASS: ${POSTGRES_PASSWORD}
   tags:
     - docker
-  image: golang:1.12.9-buster
+  image: ${GO_IMAGE}
   script:
     - go mod tidy
     - cd ${TEST_FOLDER}

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.12.9-buster AS builder
+FROM golang:1.13-buster AS builder
 
 RUN mkdir /build
 WORKDIR /build

go.mod

@@ -22,3 +22,5 @@ require (
 	gopkg.in/go-playground/validator.v9 v9.30.0
 	gopkg.in/ini.v1 v1.51.0 // indirect
 )
+
+go 1.13