add overview image (#54)

Author: laulauland

public/images/overview_diagram.png

@@ -11,6 +11,8 @@ The Autometrics Stack contains the following components:
 - Explorer for visualizing Autometrics data
 - Slack Application for better alert workflows between Prometheus and Slack
 
+![Autometrics stack overview diagram](/images/overview_diagram.png)
+
 Each of these components can be easily adopted and deployed to a hosting option of your choice (components are available as Docker images for ease of use):
 
 ### Prometheus

src/pages/deploy.mdx

@@ -24,7 +24,11 @@ Here's a simple overview video for Autometrics
 
 ## Getting started
 
-You can start working with Autometrics as early as the first lines of your code and it can take you as far as alerting about issues in your team's Slack workspace. Here are the basic steps to get you started:
+You can start working with Autometrics as early as the first lines of your code and it can take you as far as alerting about issues in your team's Slack workspace. 
+
+![Autometrics stack overview diagram](/images/overview_diagram.png)
+
+Here are the basic steps to get you started:
 
 <Steps>