Update web analytics images to use local files

docs/webanalytics/overview.mdx

@@ -19,7 +19,7 @@ With Web Analytics and Statsig Dashboards you can easily gather insights such as
 
 You can see the events flowing in your metrics page once you add web analytics to your application: https://console.statsig.com/metrics/events
 
-![Metrics events dashboard showing web analytics data](https://github.com/statsig-io/js-client/assets/74588208/9b581024-3739-402d-a62d-c91f76adc784)
+![Metrics events dashboard showing web analytics data](/img/web-analytics-dash-1.png)
 
 ## Getting Started
 
@@ -35,7 +35,7 @@ The simplest way to get started is by adding a single script tag to your website
 
 Get YOUR_CLIENT_KEY from Project Settings -> Keys & Environments. Reveal the Client API Key, copy, and paste it over the [YOUR_CLIENT_KEY] in the snippet above.
 
-![Project settings showing client API key configuration](https://github.com/statsig-io/js-client/assets/74588208/0180a38a-2b3d-43c6-aa8e-4ea04c8ac751)
+![Project settings showing client API key configuration](/img/Client-api-key-web-analytics.png)
 
 ### Option 2: HTML Script with Advanced Control
 
@@ -116,7 +116,7 @@ For details on how to enable console log autocapture, see [Console Log Capture C
 
 You can disable specific autocapture events from the Statsig console under Project Settings > Analytics & Session Replay:
 
-![Analytics event filtering configuration interface](https://github.com/user-attachments/assets/1cba9cbc-9fbe-4024-9a7f-43184efc37b9)
+![Analytics event filtering configuration interface](/img/autocapture-settings.png)
 
 ### Programmatic Event Filtering