Add GitHub action configuration

.github/workflows/dotnet.yml

@@ -0,0 +1,28 @@
+# This workflow will build a .NET project
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-net
+
+name: .NET
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: 8.0.x
+    - name: Restore dependencies
+      run: dotnet restore
+    - name: Build
+      run: dotnet build --no-restore
+    - name: Test
+      run: dotnet test --no-build --verbosity normal

README.md

@@ -11,8 +11,8 @@
 
 [Base 10] to [base 36] and vice versa.
 
-[build]:     https://ci.appveyor.com/project/TallesL/net-36
-[build-img]: https://ci.appveyor.com/api/projects/status/github/tallesl/net-36?svg=true
+[build]:     https://github.com/tallesl/net-36/actions
+[build-img]: https://github.com/tallesl/net-36/actions/workflows/dotnet.yml/badge.svg
 [nuget]:     https://www.nuget.org/packages/36
 [nuget-img]: https://badge.fury.io/nu/36.svg
 [Base 10]:   https://en.wikipedia.org/wiki/Decimal
@@ -40,4 +40,4 @@ Base36.Compare("Z", "A"); // -1
 // Checking for overflow
 Base36.WouldOverflow("BARRELROLL"); // False
 Base36.WouldOverflow("DOABARRELROLL"); // True
-```
+```