Update database configuration in Helm chart

- Modify values.yaml to allow direct database configuration with user, password, host, and name fields.
- Update configmap.yaml to construct the DATABASE_URL using the new database configuration values.

Author: PhiRho

helm/charts/backend/templates/configmap.yaml

@@ -9,7 +9,7 @@ data:
   {{- if .Values.database.url }}
   DATABASE_URL: {{ .Values.database.url | quote }}
   {{- else }}
-  DATABASE_URL: "postgresql://postgres:{{ .Values.postgresql.auth.postgresPassword }}@{{ .Release.Name }}-postgresql:5432/{{ .Values.postgresql.auth.database }}"
+  DATABASE_URL: "postgresql://{{ .Values.database.user }}:{{ .Values.database.password }}@{{ .Values.database.host }}:5432/{{ .Values.database.name }}"
   {{- end }}
   ENABLE_METRICS: "{{ .Values.enableMetrics }}"
   DYNAMODB_REGION: "{{ .Values.dynamodbRegion }}"

helm/charts/backend/values.yaml

@@ -9,7 +9,11 @@ image:
 
 # Database configuration
 database:
-  url: ""  # Will be auto-generated using release name and PostgreSQL config
+  url: ""  # If set, used directly
+  user: "postgres"
+  password: "postgres"
+  host: "localhost"
+  name: "postgres_service"
 
 # Application configuration
 secretKey: "my-secret-key"  # Key used to hash passwords stored in the database