The canonical .dockerignore was three lines while the canonical
Dockerfile does `COPY . .`, so a local .env, *.pem or *.key shipped into
the build context and could land in an image layer, invisible to every
git-based check. Copying .gitignore's patterns across is not the repair:
.dockerignore anchors an unprefixed pattern at the context root, so that
form protects only the repository root while reading as solved. Every
depth-independent pattern here carries `**/`, and secret names are
character ranges because matching is case-sensitive and an ALL-CAPS twin
still misses `Server.Key`. Public certificates are deliberately left in
as a legitimate build input. Verified by enumerating a probe image.
Model: opus-5
Add .gitignore, LICENSE (MIT), Makefile, Dockerfile, .dockerignore,
and pin prettier via yarn lockfile for integrity-checked markdown
formatting. Update REPO_POLICIES.md self-reference to point to this
repo. Format markdown files with prettier.
