Set up CI with Azure Pipelines

[skip ci]

azure-pipelines.yml

@@ -0,0 +1,31 @@
+trigger:
+  branches:
+    include:
+      - '*'
+      - refs/tags/*
+
+pool:
+  vmImage: ubuntu-latest
+
+steps:
+  - task: DownloadSecureFile@1
+    name: githubPEM
+    displayName: 'Download Github PEM'
+    inputs:
+      secureFile: 'rp-azure-pipeline-github.pem'
+  - bash: |
+      eval $(ruby -e "require 'openssl'; require 'jwt'; private_pem = File.read(ENV['GITHUB_PEM_PATH']); private_key = OpenSSL::PKey::RSA.new(private_pem); payload = { iat: Time.now.to_i - 60, exp: Time.now.to_i + (10 * 60), iss: ENV['GITHUB_APP_ID'] }; jwt = JWT.encode(payload, private_key, 'RS256'); puts 'PUSH_JWT='+jwt;")
+      TOKEN=$(curl -s -X POST \
+        -H "Authorization: Bearer $PUSH_JWT" \
+        -H "Accept: application/vnd.github.v3+json" \
+        https://api.github.com/app/installations/$GITHUB_APP_INSTALLATION_ID/access_tokens \
+        | jq -r '.token')
+       git remote add github https://x-access-token:$TOKEN@github.com/rocket-pool/$REPO_NAME
+       git fetch github
+       git push github HEAD:$(Build.SourceBranch) --verbose
+       git push github HEAD:$(Build.SourceBranch) --tags --verbose
+    displayName: 'Push to Github'
+    env:
+      GITHUB_PEM_PATH: $(githubPEM.secureFilePath)
+      GITHUB_APP_ID: $(GITHUB_APP_ID)
+      GITHUB_APP_INSTALLATION_ID: $(GITHUB_APP_INSTALLATION_ID)