Run container with uvicorn, move templates for packaging, add systemd config for container deployment, add OIDC_TEST_SETTINGS_FILE env var for setting, misc fixes

src/oidc_test/templates/non_compliant_logout.html

@@ -0,0 +1,15 @@
+{% extends "base.html" %}
+{% block content %}
+  <h2>Warning</h2>
+  <p>
+    You are logged out from the application, but the browser still has the
+    authorisation to log in again without asking for credentials.
+  </p>
+  <p>
+  This is because {{ provider.name }} does not provide "end_session_endpoint"
+  in its metadata (see: <a href="{{ provider._server_metadata_url }}">{{ provider._server_metadata_url }}</a>).
+  </p>
+  <p>
+  Please <a href="{{ provider.server_metadata['issuer'] }}">go there</a> and log out manually.
+  </p>
+{% endblock %}