Fix flaky template tests

Tests dry-running the template were sporadically failing. This occurs
when multiple tests (running simultaneously via xdist) attempt to
install the snakebids repo at the same time, as
poetry-dynamic-versioning is not thread safe (since the fs gets
modified). Resolve this by copying over the repo into the docker
container before installation

containers/test-template/test-template.sh

@@ -6,6 +6,7 @@ method="$1"
 script_name="$2"
 
 cp -r /app/* /work
+cp -r /snakebids /src
 script="'${script_name}' tests/data tests/result participant -c1 --skip-bids-validation"
 case "$method" in
     "setuptools" )

snakebids/tests/test_template.py

@@ -318,7 +318,7 @@ def test_template_dry_runs_successfully(
             "-v",
             f"{tmp_path / app_name}:/app",
             "-v",
-            f"{request.config.rootpath}:/src",
+            f"{request.config.rootpath}:/snakebids",
             "--rm",
             f"snakebids/test-template:{platform.python_version()}",
             venv,
@@ -356,7 +356,7 @@ def test_template_docs_build(tmp_path: Path, request: pytest.FixtureRequest):
             "-v",
             f"{tmp_path / app_name}:/app",
             "-v",
-            f"{request.config.rootpath}:/src",
+            f"{request.config.rootpath}:/snakebids",
             "--rm",
             f"snakebids/test-template:{platform.python_version()}",
             "docs",