Add Postgres container

.env.example

@@ -0,0 +1 @@
+DB_PASSWORD=password

compose.yaml

@@ -5,9 +5,40 @@ services:
       args:
         BIN_NAME: file_server
     restart: on-failure
+    depends_on:
+      db:
+        condition: service_healthy
 
   api_server:
     build:
       args:
         BIN_NAME: api_server
     restart: on-failure
+    depends_on:
+      db:
+        condition: service_healthy
+
+  db:
+    image: postgres:16-alpine
+    restart: on-failure
+    user: postgres
+    volumes:
+      - db-data:/var/lib/postgresql/data
+    environment:
+      - POSTGRES_PASSWORD_FILE=/run/secrets/db-password
+    secrets:
+      - db-password
+    expose:
+      - 5432
+    healthcheck:
+      test: [ "CMD", "pg_isready" ]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
+volumes:
+  db-data:
+
+secrets:
+  db-password:
+    environment: DB_PASSWORD