feat(ci): publish to Gitea's registry, and stop deploying to a random host

The image moves off registry.netork.io. That registry is plain registry:2 with
htpasswd auth, which knows nothing about repositories: every account that can log
in reads and writes everything on it, including the accounts issued to customer
instances. Verified -- a customer server's credentials list the whole catalogue.
It keeps the images those instances are meant to pull; the marketing site is not
one of them. Gitea scopes packages to their owning account, and no customer has
one. netOrk #172.

Login uses a REGISTRY_TOKEN secret (a Gitea token with write:package). The token
Actions injects per run does not work here -- the package registry rejects it
with a bare "unauthorized", which is a confusing way to spend an afternoon.

The deploy job is removed rather than migrated, because it had quietly stopped
being correct. It ran `docker run` against whatever runner picked the job up,
which worked while exactly one runner existed. There are now several --
netork-runner-12 on .12, netork-runner-13 on .13, plus the original
netork-runner -- and none of them is on 10.7.224.11, where this site runs and
where the proxy-net it attaches to lives. The next push would have started a
second website container on the wrong host and reported success while netork.io
went on serving the old one. Nothing had failed yet; the last deploy was
2026-07-17, back when the pool was one runner.

scripts/deploy.sh replaces it: it names the target, pulls before it removes
anything, compares the running container's image id against what was pulled, and
finishes by checking that netork.io actually answers 200.

Push-to-deploy can come back by registering a runner on .11 with a label of its
own and pinning `runs-on:` to it, or by giving CI an ssh key. Both decide where a
credential lives, so neither was decided here.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

scripts/deploy.sh

@@ -0,0 +1,62 @@
+#!/usr/bin/env bash
+# Deploy the marketing site to the host that actually serves it.
+#
+#   ./scripts/deploy.sh [--version=<tag>] [server]
+#
+# This used to be a CI job. It ran `docker run` on whichever runner picked the
+# job up, which was correct while exactly one runner existed — there are now
+# several, none of them on the host this site runs on, so the job would have
+# started a second container in the wrong place and reported success. Naming the
+# target is the whole point of this script.
+set -euo pipefail
+
+SERVER="${DEPLOY_SERVER:-10.7.224.11}"
+REGISTRY="${REGISTRY:-git.netork.io/netork}"
+VERSION="${VERSION:-latest}"
+NAME="${CONTAINER_NAME:-netork-website}"
+
+ENV_FILE="$(cd "$(dirname "$0")/.." && pwd)/deploy.env"
+# shellcheck source=/dev/null
+[[ -f "$ENV_FILE" ]] && source "$ENV_FILE"
+
+for arg in "$@"; do
+  case "$arg" in
+    --version=*) VERSION="${arg#--version=}" ;;
+    *) SERVER="$arg" ;;
+  esac
+done
+
+IMAGE="${REGISTRY}/website:${VERSION}"
+echo "[${SERVER}] Deploying ${IMAGE}"
+
+if [[ -n "${REGISTRY_TOKEN:-}" ]]; then
+  ssh -n "$SERVER" "echo '${REGISTRY_TOKEN}' | docker login git.netork.io -u '${REGISTRY_USER:-christianmanivong}' --password-stdin" \
+    | sed "s/^/[${SERVER}] /"
+fi
+
+# Pull first, and let a failure stop the script here: the container is only
+# removed once there is something to replace it with.
+echo "[${SERVER}] Pulling..."
+ssh -n "$SERVER" "docker pull '${IMAGE}'" | tail -2 | sed "s/^/[${SERVER}] /"
+
+echo "[${SERVER}] Recreating..."
+ssh -n "$SERVER" "docker rm -f '${NAME}' >/dev/null 2>&1 || true; \
+  docker run -d --name '${NAME}' --restart unless-stopped --network proxy-net '${IMAGE}' >/dev/null && echo started" \
+  | sed "s/^/[${SERVER}] /"
+
+# `docker run` cannot silently reuse an old container the way `compose up -d`
+# can, but the tag it resolved might still not be the one that was just pulled.
+# Compare, rather than trust.
+echo "[${SERVER}] Verifying..."
+WANT=$(ssh -n "$SERVER" "docker image inspect --format '{{.Id}}' '${IMAGE}'")
+GOT=$(ssh -n "$SERVER" "docker inspect --format '{{.Image}}' '${NAME}'")
+if [[ "$WANT" != "$GOT" ]]; then
+  echo "[${SERVER}] ERROR: container runs ${GOT}, expected ${WANT}" >&2
+  exit 1
+fi
+echo "[${SERVER}] Verified: ${NAME} runs ${IMAGE}."
+
+echo "[${SERVER}] Checking the site answers..."
+CODE=$(curl -s -o /dev/null -w '%{http_code}' --max-time 20 https://netork.io/ || echo 000)
+echo "[${SERVER}] https://netork.io -> ${CODE}"
+[[ "$CODE" == "200" ]] || { echo "[${SERVER}] ERROR: site is not answering 200" >&2; exit 1; }