ci: copy runtime options through Docker API

tests/test_addon_metadata.py

@@ -143,6 +143,14 @@ def test_runtime_accepts_docker_port_unpublished_status() -> None:
     assert 'docker port "$container" 9222/tcp 2>/dev/null || true' in runtime_test
 
 
+def test_runtime_copies_options_without_a_host_bind_mount() -> None:
+    runtime_test = (ROOT / "tests/test_runtime.sh").read_text(encoding="utf-8")
+    assert "docker create --name" in runtime_test
+    assert 'docker cp "$options_file" "$container:/data/options.json"' in runtime_test
+    assert 'docker start "$container"' in runtime_test
+    assert "--mount" not in runtime_test
+
+
 def test_ci_builds_and_loads_only_the_amd64_test_image() -> None:
     workflow = (ROOT / ".gitea/workflows/ci.yml").read_text(encoding="utf-8")
     parsed = yaml.safe_load(workflow)

tests/test_runtime.sh

@@ -58,12 +58,12 @@ PY
 
 start_container() {
     local container="$1"
-    docker run --detach \
-        --name "$container" \
+    docker create --name "$container" \
         --platform linux/amd64 \
-        --mount "type=bind,src=${options_file},dst=/data/options.json,readonly" \
         --publish 127.0.0.1::8080 \
         "$image" >/dev/null
+    docker cp "$options_file" "$container:/data/options.json"
+    docker start "$container" >/dev/null
 }
 
 host_port() {