* 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
feat(Dockerfile): add gcc, g++, git, and make to apt-get install
feat(Dockerfile): add user and set environment variables
feat(Dockerfile): add WORKDIR and COPY
feat(Dockerfile): update langflow to version 0.0.71
feat(Dockerfile): add --port flag to CMD