Add FastAPI web/API layer and static site

- queries.py: shared read-only query helpers (feed, brief, category counts)
  returning plain dicts, used by the API and available to the CLI.
- api.py: FastAPI service with Pydantic response models (the companion-app
  contract), CORS, and endpoints for categories, feed, brief, and health;
  mounts a static site at /.
- static/index.html: minimal dependency-free site rendering the daily five
  and topic/flavor category browsing.
- 'goodnews serve' command launches uvicorn (lazy import; core CLI stays
  pure-stdlib). Web deps live behind the optional [web] extra.
- Dockerfile + .dockerignore + build-system metadata so the service installs
  and deploys cleanly, with the DB mounted as a shared volume.
- README: web/API and deployment docs.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

pyproject.toml

@@ -1,10 +1,28 @@
+[build-system]
+requires = ["setuptools>=68"]
+build-backend = "setuptools.build_meta"
+
 [project]
 name = "goodnews"
 version = "0.1.0"
 description = "Local-first constructive news ingestion and filtering prototype."
 requires-python = ">=3.11"
+# The ingestion CLI is intentionally pure-stdlib. The optional `web` extra adds
+# the API/site layer so the two halves can be deployed and upgraded independently.
 dependencies = []
 
+[project.optional-dependencies]
+web = [
+    "fastapi>=0.110",
+    "uvicorn[standard]>=0.29",
+]
+
 [project.scripts]
 goodnews = "goodnews.cli:main"
 
+[tool.setuptools]
+packages = ["goodnews"]
+
+[tool.setuptools.package-data]
+goodnews = ["static/*"]
+