Added TeamCity integration docs

docs/integrations/cloud/teamcity.mdx

@@ -0,0 +1,42 @@
+---
+title: "TeamCity"
+description: "How to sync secrets from Infisical to TeamCity"
+---
+
+Prerequisites:
+
+- Set up and add envars to [Infisical Cloud](https://app.infisical.com)
+
+## Navigate to your project's integrations tab
+
+![integrations](../../images/integrations.png)
+
+## Enter your TeamCity API Token and Server URL
+
+Obtain a TeamCity API Token in Profile > Access Tokens
+
+![integrations teamcity dashboard](../../images/integrations-teamcity-dashboard.png)
+![integrations teamcity tokens](../../images/integrations-teamcity-tokens.png)
+
+Obtain your TeamCity Server URL in Administration > Cloud Server Settings > Server URL
+
+![integrations teamcity projects](../../images/integrations-teamcity-projects.png)
+![integrations teamcity server url](../../images/integrations-teamcity-serverurl.png)
+
+Press on the TeamCity tile and input your TeamCity API Token and Server URL to grant Infisical access to your TeamCity account.
+
+![integrations teamcity authorization](../../images/integrations-teamcity-auth.png)
+
+<Info>
+  If this is your project's first cloud integration, then you'll have to grant
+  Infisical access to your project's environment variables. Although this step
+  breaks E2EE, it's necessary for Infisical to sync the environment variables to
+  the cloud platform.
+</Info>
+
+## Start integration
+
+Select which Infisical environment secrets, you want to sync to which TeamCity project and press create integration to start syncing secrets to TeamCity.
+
+![integrations teamcity](../../images/integrations-teamcity-create.png)
+![integrations teamcity](../../images/integrations-teamcity.png)