Switch to secret-based environment variables for database configuration in attachments app deployment

apps/attachments/base/deployment.yaml

@@ -67,18 +67,30 @@ spec:
             - name: DATABASE_SSL_MODE
               value: disable
             - name: DATABASE_HOST
-              value: "postgresql.attachments"
+              valueFrom:
+                secretKeyRef:
+                  name: postgresql-secrets
+                  key: host
             - name: DATABASE_PORT
-              value: "5432"
+              valueFrom:
+                secretKeyRef:
+                  name: postgresql-secrets
+                  key: port
             - name: DATABASE_NAME
-              value: attachments_db
+              valueFrom:
+                secretKeyRef:
+                  name: postgresql-secrets
+                  key: database
             - name: DATABASE_USER
-              value: attachments
+              valueFrom:
+                secretKeyRef:
+                  name: postgresql-secrets
+                  key: username
             - name: DATABASE_PASSWORD
               valueFrom:
                 secretKeyRef:
-                  name: postgresql
+                  name: postgresql-secrets
-                  key: postgres-password
+                  key: password
       imagePullSecrets:
         - name: regcred