feat: improve docker containerization and add LLM timeout

docker-compose.yaml

@@ -10,7 +10,11 @@ services:
     volumes:
       - data:/var/lib/postgresql
     healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER:-postgres} -d ${POSTGRES_DB:-messages}"]
+      test:
+        [
+          "CMD-SHELL",
+          "pg_isready -U ${POSTGRES_USER:-postgres} -d ${POSTGRES_DB:-messages}",
+        ]
       interval: 5s
       timeout: 5s
       retries: 5
@@ -33,7 +37,7 @@ services:
       - .env
     environment:
       - LLM_MODEL=${LLM_MODEL:-deepseek}
-      - POSTGRES_HOST=messages_db
+      - POSTGRES_HOST=${POSTGRES_HOST:-db}
       - POSTGRES_USER=${POSTGRES_USER:-postgres}
       - POSTGRES_PASSWORD=${POSTGRES_PASSWORD:-postgres}
       - POSTGRES_DB=${POSTGRES_DB:-messages}