added solution for coreOnly

.gitlab-ci.yml

@@ -1,15 +1,15 @@
-image: mcr.microsoft.com/dotnet/core/sdk:3.0
+image: mcr.microsoft.com/dotnet/sdk:5.0
 
 before_script:
-    - dotnet restore
+    - dotnet restore Exemples_coreOnly.sln
  
 build:
     stage: build
     tags:
         - docker
     script:
-        - dotnet build -c Release --no-restore
-        - dotnet publish -c Release --no-restore -o $CI_PROJECT_DIR/build/release
+        - dotnet build Exemples_coreOnly.sln -c Release --no-restore
+        - dotnet publish Exemples_coreOnly.sln -c Release --no-restore -o $CI_PROJECT_DIR/build/release
     artifacts:
         paths:
             - $CI_PROJECT_DIR/build/release
@@ -17,4 +17,4 @@ build:
 #test:
 #    stage: test
 #    script:
-#        - dotnet test --no-restore
+#        - dotnet test --no-restore