More readme updates.

Signed-off-by: Cliff Hill <xlorep@darkhelm.org>

README.md

@@ -180,20 +180,35 @@ I would have templates in place for creating a PR, with a set of instructions th
 
 ### Diagrams
 
-Docker Compose Components:
+#### Docker Compose Components
 
 ```mermaid
 graph TD
-    subgraph Docker_Network
-        B[Frontend] -->|HTTP/REST: Port 8000| C[Backend]
-        C -->|SQL: Port 5432| D[PostgreSQL]
-    end
-    A[World] -->|HTTP: Port 3000| B
+  subgraph Docker_Network
+    B[Frontend]
+    C[Backend]
+    D[PostgreSQL]
+    C -- "SQL: 5432" --> D
+  end
+  Client[Client] -- "HTTP: 3000" --> B
+  Client -- "HTTP/REST: 8000" --> C
 ```
 
 ---
 
-## Database Schema Outline
+#### Connecting to the Database During Development
+
+When running with `compose.dev.yml`, the database is exposed on port 5432. You can connect using `psql`:
+
+```bash
+psql -h localhost -U user -d mydb
+```
+
+Enter the password when prompted (see your `.env` file, default is `password`).
+
+---
+
+#### Database Schema Outline
 
 **users**
 
@@ -225,7 +240,7 @@ graph TD
 
 ---
 
-## Component Diagram
+#### Component Diagram
 
 ```mermaid
 graph TD
@@ -244,7 +259,7 @@ graph TD
 
 ---
 
-Backend Request Data Path:
+#### Backend Request Data Path
 
 ```mermaid
 sequenceDiagram
@@ -268,5 +283,3 @@ sequenceDiagram
     Service_Layer-->>API_Endpoint: Return Response Data
     API_Endpoint-->>Frontend: HTTP Response
 ```
-
----