Add README note about running multiple instances

[Copilot]

Added documentation to the README explaining how to run multiple revect instances for different purposes:

• Added a new section "🧠 Running Multiple Containers" that explains:
  • How to run multiple containers with different ports (8000, 8001, etc.)
  • How to use different volume mounts for separate databases
  • Use case examples for separating knowledge domains (general vs coding-specific)

This allows users to set up specialized knowledge bases - one for general knowledge and another for coding-related information, as requested in the issue.

Example from the added documentation:

# Container 1: General Knowledge
docker run \
  -p 8000:3000 \
  -v ~/Documents/revect-general:/app/data \
  ...

# Container 2: Coding Knowledge
docker run \
  -p 8001:3000 \
  -v ~/Documents/revect-coding:/app/data \
  ...

Also included connection examples for MCP to access each specialized knowledge container.

Fixes #56.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• bun.sh
  • Triggering command: curl -fsSL REDACTED (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.