Fix configurazione del env

[Whyle]

Dare possibilita anche di eseguire con i env opzionali

[Copilot]

Pull Request Overview

This PR refactors environment configuration to allow optional environment variable usage for database and document paths while enforcing required API key validation. Key changes include:

• Removing hard-coded environment variables from docker-compose.yml
• Updating service calls in file_manager_service.py and document retrieval in app/routes/documents.py to use environment variables with fallback defaults
• Adding an early environment variable check for OPENAI_API_KEY in app/config.py

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
docker-compose.yml	Removed fixed environment definitions to allow dynamic configuration via env variables
app/services/file_manager_service.py	Updated URL endpoints to be constructed based on DATABASE_URL from environment
app/routes/documents.py	Modified document directory lookup using DOCUMENTS_DIR environment variable
app/config.py	Added a check for OPENAI_API_KEY and default DATABASE_URL configuration

[Copilot]

[nitpick] Consider using a URL join function (e.g., urllib.parse.urljoin) to construct endpoints correctly and avoid potential issues with duplicated or missing slashes when DATABASE_URL already ends with a slash.

[lucaribon]

le modifiche fatte portano nuovi problemi, probabilemente nelle chiamate fatte da llm alle api del db; in ogni caso non ha senso spendere tempo per sistemare questi dettagli e poi dover aggiornare documenti, soprattutto in questa fase del progetto.