Add Hello CodeMoon with test

.gitignore

@@ -0,0 +1,2 @@
+# Project binary
+coolcodeoceannomadmiddleware

.gitlab-ci.yml

@@ -0,0 +1,10 @@
+default:
+  image: golang:latest
+
+stages:
+  - test
+
+test:
+  stage: test
+  script:
+    - go test -v

go.mod

@@ -0,0 +1,5 @@
+module gitlab.hpi.de/codeocean/codemoon/coolcodeoceannomadmiddleware
+
+go 1.16
+
+require github.com/stretchr/testify v1.7.0

go.sum

@@ -0,0 +1,11 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

main.go

@@ -0,0 +1,12 @@
+package main
+
+import "fmt"
+
+// HelloCodeMoon returns 'Hello, CodeMoon!'
+func HelloCodeMoon() string {
+	return "Hello, CodeMoon!"
+}
+
+func main() {
+	fmt.Println(HelloCodeMoon())
+}

main_test.go

@@ -0,0 +1,10 @@
+package main
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestHelloCodeMoon(t *testing.T) {
+	assert.Equal(t, "Hello, CodeMoon!", HelloCodeMoon())
+}