Add nginx (closes #11)

Install nginx from apt and check nginx -v in the smoke test.

Model: deepseek-v4-pro

README.md

@@ -50,6 +50,7 @@ Image: `git.eeqj.de/sneak/baseimage`, built for `linux/amd64` and
 | Bundler         | apt `bundler`                  | `bundle` on `PATH`             |
 | Valkey          | apt `valkey-server`, `valkey-tools` | `valkey-server`, `valkey-cli` |
 | PostgreSQL      | apt `postgresql`               | `psql`, `postgres` under `/usr/lib/postgresql/*/bin` |
+| nginx           | apt                            | `/usr/sbin/nginx`              |
 
 Plus the usual odds and ends: `git`, `curl`, `wget`, `jq`, `rsync`,
 `openssh-client`, `zip`/`unzip`, `xz-utils`, `bzip2`, and the `-dev`

bin/test

@@ -35,6 +35,7 @@ vips -l | grep -i heif > /dev/null
     valkey-server --version
     valkey-cli --version
     psql --version
+    nginx -v
     playwright --version
     firefox --version
     geckodriver --version

build.sh

@@ -32,7 +32,8 @@ apt-get -y install --no-install-recommends \
     libvips-dev libvips-tools libheif-dev libheif-plugin-aomenc \
     imagemagick ghostscript \
     ruby ruby-dev bundler \
-    valkey-server valkey-tools postgresql
+    valkey-server valkey-tools postgresql \
+    nginx
 
 # --- Go (latest) -------------------------------------------------------------
 gover="$(curl -fsSL 'https://go.dev/VERSION?m=text' | head -n1)"
@@ -149,6 +150,7 @@ bundle --version
 valkey-server --version
 valkey-cli --version
 psql --version
+nginx -v
 hugo version
 node --version
 npm --version