strip docker type — site-publish is static-content only

Removes type: docker handling from action.yaml, scripts (build/deploy/utils/setup),
and templates (deployment.yaml.j2, service-docker.yaml.j2). Renamed
service-static.yaml.j2 -> service.yaml.j2.

If site.yaml has type: docker, parse_site_yaml() now dies with a clear message
pointing to action/image-build + action/image-push + action/image-deploy with
hand-authored apps-repo manifests. rainsounds.vino.network was the only docker
consumer and has already migrated.

Drops registry-password input from action.yaml (no longer needed).

scripts/build.py

@@ -1,12 +1,11 @@
-"""Build phase — content prep (static) or docker image build."""
+"""Build phase — content prep for static-content sites."""
 
-import os
 import shutil
 import subprocess
 import tempfile
 from pathlib import Path
 
-from utils import EXCLUDE_FILES, die, env, parse_site_yaml, run
+from utils import EXCLUDE_FILES, env, parse_site_yaml, run
 
 
 def build_static(site_dir, cfg):
@@ -55,35 +54,6 @@ def build_static(site_dir, cfg):
     print(f"Build complete — content at {html_dir}")
 
 
-def docker_login():
-    password = os.environ.get("REGISTRY_PASSWORD", "")
-    user = env("CI_BOT_USER", "ci-bot")
-    if not password:
-        die("REGISTRY_PASSWORD is required for docker builds")
-    subprocess.run(
-        f"echo '{password}' | docker login code.fritzlab.net -u {user} --password-stdin",
-        shell=True, check=True,
-    )
-
-
-def build_docker(site_dir, cfg):
-    docker_login()
-    image = cfg["image"]
-    run_number = env("GITHUB_RUN_NUMBER", "0")
-    tags = [f"{image}:latest", f"{image}:{run_number}"]
-
-    cmd_parts = ["docker", "build"]
-    for tag in tags:
-        cmd_parts += ["-t", tag]
-    cmd_parts += ["--network", "host", "--provenance=false"]
-    for key, val in cfg.get("build_args", {}).items():
-        cmd_parts += ["--build-arg", f"{key}={val}"]
-    cmd_parts.append(str(site_dir))
-
-    run(" ".join(cmd_parts))
-    print(f"Docker build complete — tags: {', '.join(tags)}")
-
-
 def cmd_build():
     site_dir = Path(env("SITE_DIR"))
     cfg = parse_site_yaml(site_dir)
@@ -92,7 +62,4 @@ def cmd_build():
         print("Site disabled — skipping build")
         return
 
-    if cfg["type"] == "docker":
-        build_docker(site_dir, cfg)
-    else:
-        build_static(site_dir, cfg)
+    build_static(site_dir, cfg)