feat: add first database migration

backend/hermes/docker-compose.yml

@@ -1,5 +1,23 @@
 services:
 
+  postgres:
+    image: postgres:17
+
+    container_name: hermes-postgres
+
+    restart: unless-stopped
+
+    environment:
+      POSTGRES_DB: olympus
+      POSTGRES_USER: olympus
+      POSTGRES_PASSWORD: olympus123
+
+    ports:
+      - "5432:5432"
+
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+
   hermes:
     build: .
 
@@ -7,15 +25,16 @@ services:
 
     restart: unless-stopped
 
+    depends_on:
+      - postgres
+
+    environment:
+      DATABASE_URL: postgresql+psycopg://olympus:olympus123@postgres:5432/olympus
+      APP_NAME: Hermes API
+      APP_VERSION: 0.1.0
+
     ports:
       - "8000:8000"
 
-    environment:
-      DATABASE_URL: postgresql://olympus:DEIN_PASSWORT@olympus-db:5432/olympus
-
-    networks:
-      - olympus-network
-
-networks:
-  olympus-network:
-    external: true
+volumes:
+  postgres_data: