Create a docker/podman containerized version of this app

[slmingol]

Make it so this project has a dockerfile/docker-compose setup so that it can be run w/o locally installing anything.

[slmingol]

Implemented in f23922e.

• docker-compose.yaml — two services: graphify (CLI indexing, profile:cli) and mcp (HTTP server). Works with both docker compose and podman compose.
• Makefile — auto-detects docker vs podman; make build, make index [SRC=...], make up, make down, make logs.
• Dockerfile — entrypoint changed to graphify CLI (general-purpose); graphify-mcp still reachable via --entrypoint.

Quick start:

make build
make index                       # indexes current directory
GRAPHIFY_API_KEY=secret make up  # start MCP HTTP server on :8080