remove PostgreSQL references from technical requirements

Author: Mohsin Zaidi

docs/introduction/technical-reqs.md

@@ -6,24 +6,16 @@ Ceramic is a decentralized data storage network made up of different components,
 
 ![Architecture](/img/app-architecture-overview.png)
 
-
-To make it easier to grasp, you can think about implementing Ceramic just like you might think about implementing a traditional SQL or PostgreSQL database.
-
 When integrating with Ceramic, you will be running a few different services and components, each serving a specific purpose for running your application:
 
 - `ceramic-one` - the Ceramic node written in Rust, responsible for storing data, providing HTTP API access, and coordinating with network participants
-- `PostgreSQL` - used for indexing data
 - `EVM RPC node access` - required for self-anchoring to EVM blockchains (optional, but recommended for production)
 
 With self-anchoring support, you can run your own anchor service on any EVM-compatible blockchain instead of relying on external services. See [Self-Anchoring](../protocol/ceramic-one/anchoring/overview) for more details.
 
-Ceramic nodes are simply pieces of software that run on a server. PostgreSQL is a type of traditional database.
-
 ## Hardware requirements
 
-For most projects, all three components of Ceramic can be run on the same server. Thus the main consideration impacting costs are the hardware requirements of your server.
-
-Depending on the expected throughput of your project, the suggested hardware requirements will differ. Below, you can find the estimated hardware requirements based on a different levels of expected throughput.
+Depending on the expected throughput of your project, the suggested hardware requirements will differ. Below, you can find the estimated hardware requirements based on different levels of expected throughput.
 
 ### Minimum (light throughput)
 
@@ -33,8 +25,6 @@ Depending on the expected throughput of your project, the suggested hardware req
 | RAM | 4GB |
 | Storage | 110GB |
 
-
-
 ### Recommended
 
 As your project scales, you may need to expand your storage beyond 180GB.
@@ -45,72 +35,17 @@ As your project scales, you may need to expand your storage beyond 180GB.
 | RAM | 8 GB |
 | Storage | 180GB |
 
-
 ### Advanced (heavy throughput)
 
-Advanced users may want to consider running the PostgreSQL database on a different server than the Ceramic node.  If you choose to run them on different servers, a VPC can be used to establish the communication between them.
-
-
-
-<div style={{ display: "flex", justifyContent: "flex-start" }}>
-  <div style={{ marginRight: "100px" }}>
-    <div style={{ fontWeight: "bold", marginBottom: "8px" }}>Ceramic node</div>
-    <table style={{ borderCollapse: "collapse", width: "100%" }}>
-      <thead>
-        <tr>
-          <th style={{ textAlign: "left", padding: "8px" }}>Resource</th>
-          <th style={{ textAlign: "left", padding: "8px" }}>Size</th>
-        </tr>
-      </thead>
-      <tbody>
-        <tr>
-          <td style={{ textAlign: "left", padding: "8px" }}>CPU</td>
-          <td style={{ textAlign: "left", padding: "8px" }}>2 4CPU Cores</td>
-        </tr>
-        <tr>
-          <td style={{ textAlign: "left", padding: "8px" }}>RAM</td>
-          <td style={{ textAlign: "left", padding: "8px" }}>8 GB</td>
-        </tr>
-        <tr>
-          <td style={{ textAlign: "left", padding: "8px" }}>Storage</td>
-          <td style={{ textAlign: "left", padding: "8px" }}>180GB</td>
-        </tr>
-      </tbody>
-    </table>
-  </div>
-  
-  <div>
-    <div style={{ fontWeight: "bold", marginBottom: "8px" }}>PostgreSQL DB</div>
-    <table style={{ borderCollapse: "collapse", width: "100%" }}>
-      <thead>
-        <tr>
-          <th style={{ textAlign: "left", padding: "8px" }}>Resource</th>
-          <th style={{ textAlign: "left", padding: "8px" }}>Size</th>
-        </tr>
-      </thead>
-      <tbody>
-        <tr>
-          <td style={{ textAlign: "left", padding: "8px" }}>CPU</td>
-          <td style={{ textAlign: "left", padding: "8px" }}>1 2CPU Cores</td>
-        </tr>
-        <tr>
-          <td style={{ textAlign: "left", padding: "8px" }}>RAM</td>
-          <td style={{ textAlign: "left", padding: "8px" }}>4 GB</td>
-        </tr>
-        <tr>
-          <td style={{ textAlign: "left", padding: "8px" }}>Storage</td>
-          <td style={{ textAlign: "left", padding: "8px" }}>110GB</td>
-        </tr>
-      </tbody>
-    </table>
-  </div>
-</div>
-
-
+| Resource | Size |
+| --- | --- |
+| CPU | 4 CPU Cores |
+| RAM | 8 GB |
+| Storage | 180GB+ |
 
 ## Hosting solutions and costs
 
-One of the key factors impacting costs is how you choose to host your Ceramic node.  A few options are shown below.  Monthly server costs are **estimated** based on the hardware requirements above.
+One of the key factors impacting costs is how you choose to host your Ceramic node. A few options are shown below. Monthly server costs are **estimated** based on the hardware requirements above.
 
 <table style={{ width: "100%", borderCollapse: "collapse" }}>
   <tr>
@@ -134,5 +69,3 @@ One of the key factors impacting costs is how you choose to host your Ceramic no
     <td style={{ textAlign: "left", verticalAlign: "top" }}>- Application developers who prefer to use third party managed node services can offload node management responsibilities to dedicated professionals</td>
   </tr>
 </table>
-
-