Add Dockerfile and docker-compose.yml for pre-production environment setup

docker_example/pre.Dockerfile

@@ -0,0 +1,3 @@
+FROM logspace/langflow:1.0-alpha
+
+CMD ["python", "-m", "langflow", "run", "--host", "0.0.0.0", "--port", "7860"]

docker_example/pre.docker-compose.yml

@@ -0,0 +1,30 @@
+version: "3.8"
+
+services:
+  langflow:
+    image: logspace/langflow:1.0-alpha
+    ports:
+      - "7860:7860"
+    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: