Add circleci file

.circleci/config.yml

@@ -0,0 +1,32 @@
+version: 2
+jobs:
+  build:
+    machine: 
+      docker_layer_caching: true
+    steps: 
+      - checkout
+      - run: docker build .
+  test:
+    machine: true
+    steps:
+      - checkout
+      - run:
+          command: |
+            lsb_release -a
+            wget -q https://packages.microsoft.com/config/ubuntu/14.04/packages-microsoft-prod.deb
+            sudo dpkg -i packages-microsoft-prod.deb
+            sudo apt-get install apt-transport-https
+            sudo apt-get update
+            sudo apt-get install dotnet-sdk-2.1
+            cd BTCPayServer.Tests
+            docker-compose up -d
+            sleep 60
+            docker ps
+            dotnet test
+
+
+workflows:
+  version: 2
+  build_and_test:
+    jobs:
+      - test