Accidentally deleted ci file

.gitlab-ci.yml

@@ -0,0 +1,34 @@
+image: mcr.microsoft.com/dotnet/core/sdk:3.1
+
+stages:
+  - build
+  - test
+  - publish
+
+before_script:
+  - echo "Setting up environment"
+  - 'dotnet --version'
+
+build:
+  stage: build
+  script:
+    - dotnet restore
+    - dotnet build --configuration Release --no-restore
+  artifacts:
+    paths:
+      - "**/bin/Release"
+
+test:
+  stage: test
+  script:
+    - dotnet test --no-restore --verbosity normal
+
+publish:
+  stage: publish
+  script:
+    - dotnet pack -c Release -o .
+    - for nupkg in *.nupkg; do dotnet nuget push $nupkg -k $NUGET_API_KEY -s https://api.nuget.org/v3/index.json; done
+  only:
+    - main
+  variables: 
+    NUGET_API_KEY: $NUGET_API_KEY