feat: add Containerfile and compose.yaml for podman

Alpine-based image (59MB), source and config bind-mounted via
compose.yaml. Host networking for access to local Tor nodes.

Makefile

@@ -1,4 +1,6 @@
-.PHONY: install test lint clean
+APP_NAME := s5p
+
+.PHONY: install test lint clean build up down logs
 
 install:
 	pip install -e .
@@ -12,3 +14,15 @@ lint:
 clean:
 	rm -rf build/ dist/ src/*.egg-info
 	find . -type d -name __pycache__ -exec rm -rf {} +
+
+build:
+	podman-compose build
+
+up:
+	podman-compose up -d
+
+down:
+	podman-compose down
+
+logs:
+	podman-compose logs -f