Merge branch 'linda-docs-8' of https://github.com/DefangLabs/defang-docs into linda-docs-8

Author: commit111

docs/concepts/accounts.md

@@ -8,9 +8,7 @@ sidebar_position: 100
 
 Below, we will cover account creation with Defang, and how resources are organized within a cloud environment using your account info.
 
-Defang requires an account so we can organize your resources and provide you with a way to manage them. We also use your account to authenticate you when you interact with [Defang Playground](./defang-playground.md) and the [Defang Portal](./portal.md). 
-
-Eventually, billing and payment information will be associated with your account.
+Defang requires an account so we can organize your resources and provide you with a way to manage them. We also use your account to authenticate you when you interact with [Defang Playground](./defang-playground.md) and the [Defang Portal](./portal.md). Billing and payment information is also associated with your account.
 
 ## Creating an Account
 

docs/concepts/deployments.md

@@ -10,14 +10,22 @@ When you deploy using Defang, whether it's with `defang compose up` with a [Comp
 
 ## Deploying Updates
 
-When you run a deployment to update one or more [services](/docs/concepts/services), Defang will also make sure to get your new services up and running before deprovisioning any old services so you don't have to worry about downtime.
+When you run a deployment to update one or more [services](/docs/concepts/services), Defang will build new images for your services, and provision new resources to replace your existing services.
+
+### Zero Downtime Deployments
+
+Defang can deploy your services using different [modes](/docs/concepts/deployment-modes). When using the `production` mode, Defang will make sure the new replacement services are healthy before deprovisioning your existing services.
+
+By default, using the `development` mode, Defang will deprovision your existing services before provisioning replacements. This helps reduce costs.
 
 :::info
 In [Defang BYOC](./defang-byoc.md), Defang uses your cloud provider account to build and store your images. In [Defang Playground](./defang-playground.md), we build and store your images for you.
 :::
 
-Note that we offer different [deployment modes](/docs/concepts/deployment-modes): development, staging, and production. You can switch the modes using the CLI. 
 
+### Deployment Modes
+
+As mentioned above, Defang offers different [deployment modes](/docs/concepts/deployment-modes): `development`, `staging`, and `production`. You can switch the modes using the `--mode` CLI flag.
 :::warning
 Workloads with GPUs do not support zero downtime deployments. If you have a workload with a GPU, you will experience downtime during updates.
 :::