Update Dockerfile, docker-compose.yml, and add langflow 1.0-alpha tag (#1620)

* Update Dockerfile to use logspace/langflow:latest image

* Update docker-compose.yml with new version and add PostgreSQL service

* Add langflow 1.0-alpha tag

docker_example/docker-compose.yml

@@ -1,10 +1,30 @@
-version: '3'
+version: "3.8"
 
 services:
   langflow:
-    build:
-      context: .
-      dockerfile: Dockerfile
+    image: logspace/langflow:latest
     ports:
       - "7860:7860"
-    command: langflow run --host 0.0.0.0
+    depends_on:
+      - postgres
+    environment:
+      - LANGFLOW_DATABASE_URL=postgresql://langflow:langflow@postgres:5432/langflow
+      # This variable defines where the logs, file storage, monitor data and secret keys are stored.
+      - LANGFLOW_CONFIG_DIR=/var/lib/langflow
+    volumes:
+      - langflow-data:/var/lib/langflow
+
+  postgres:
+    image: postgres:16
+    environment:
+      POSTGRES_USER: langflow
+      POSTGRES_PASSWORD: langflow
+      POSTGRES_DB: langflow
+    ports:
+      - "5432:5432"
+    volumes:
+      - langflow-postgres:/var/lib/postgresql/data
+
+volumes:
+  langflow-postgres:
+  langflow-data: