update docker docs, fix links, add export cmd

docs/cli/commands/export.mdx

@@ -15,7 +15,7 @@ Export environment variables from the platform into a file format.
 | Option        | Description                                                                                                                                  | Default value |
 | ------------- | -------------------------------------------------------------------------------------------------------------------------------------------- | ------------- |
 | `--env`       | Used to set the environment that secrets are pulled from. Accepted values: `dev`, `staging`, `test`, `prod`                                  | `dev`         |
-| `--projectId` | Used to determine from which infisical project your secrets will be exported from (only required if injecting via the service token method). | `None`        |
+| `--projectId` | Only required if injecting via the [service token method](../token). If you are not using service token, the project id will be automatically retrieved from the `.infisical.json` located at the root of your local project.  | `None`        |
 | `--expand`    | Parse shell parameter expansions in your secrets (e.g., `${DOMAIN}`)                                                                         | `true`        |
 | `--format`    | Format of the output file. Accepted values: `dotenv`, `csv` and `json`                                                                       | `dotenv`      |
 

docs/cli/overview.mdx

@@ -1,5 +1,5 @@
 ---
-title: "Overview"
+title: "Install"
 ---
 
 Prerequisite: Set up an account with [Infisical Cloud](https://app.infisical.com) or via a [self-hosted installation](/self-hosting/overview).