fix: postgresql container volume

Reviewed-on: #7
Co-authored-by: Jarno Kiesiläinen <jarnokie@gmail.com>
Co-committed-by: Jarno Kiesiläinen <jarnokie@gmail.com>

README.md

@@ -5,10 +5,28 @@
 ```mermaid
 classDiagram
     class Activity {
+        +Long id
         +String name
         +Location location
-        +Int priceRange
+        +Integer priceRange
         +List~String~ tags
+        +String description
+        +LocalDateTime createdAt
+        +LocalDateTime updatedAt
     }
-```
     
+    class Location {
+        +Long id
+        +String name
+        +String address
+        +String city
+        +String country
+        +String postalCode
+        +Double latitude
+        +Double longitude
+        +LocalDateTime createdAt
+        +LocalDateTime updatedAt
+    }
+    
+    Activity <-- Location : belongs to
+```

backend/src/main/resources/application.yml

@@ -1,5 +1,5 @@
 server:
-  port: 8080
+  port: 8090
   servlet:
     context-path: /api
 
@@ -9,7 +9,7 @@ spring:
   
   # Database Configuration
   datasource:
-    url: jdbc:postgresql://localhost:5432/vibing
+    url: jdbc:postgresql://dind:5432/vibing
     username: vibing
     password: vibing
     driver-class-name: org.postgresql.Driver

local-dev/compose.yml

@@ -9,3 +9,6 @@ services:
       POSTGRES_DB: vibing
     volumes:
       - postgres_data:/var/lib/postgresql/data
+
+volumes:
+  postgres_data: