Initial commit

This is a FastAPI backend microservice template used with `copier` utility.

Features of applied template are:
- Configuration file processing logic
- Metrics and tracing (both optional) configuration available
- Debug endpoints
- Database migration commands, prepared Alembic environment
- Database usage example in ping_db endpoint
- gitea sanity check pipeline

{{project_slug}}/handlers/system.py.jinja

@@ -0,0 +1,43 @@
+"""System endpoints are defined here."""
+
+import fastapi
+from starlette import status
+
+from {{project_slug}}.dependencies import connection_manager_dep
+from {{project_slug}}.logic import system as system_logic
+from {{project_slug}}.schemas import PingResponse
+
+from .routers import system_router
+
+
+@system_router.get("/", status_code=status.HTTP_307_TEMPORARY_REDIRECT, include_in_schema=False)
+@system_router.get("/api/", status_code=status.HTTP_307_TEMPORARY_REDIRECT, include_in_schema=False)
+async def redirect_to_swagger_docs():
+    """Redirects to **/api/docs** from **/**"""
+    return fastapi.responses.RedirectResponse("/api/docs", status_code=status.HTTP_307_TEMPORARY_REDIRECT)
+
+
+@system_router.get(
+    "/health_check/ping",
+    response_model=PingResponse,
+    status_code=status.HTTP_200_OK,
+)
+async def ping():
+    """
+    Check that application is alive.
+    """
+    return PingResponse()
+
+
+@system_router.get(
+    "/health_check/ping_db",
+    response_model=PingResponse,
+    status_code=status.HTTP_200_OK,
+)
+async def ping_db(request: fastapi.Request, readonly: bool = False):
+    """
+    Check that database connection is valid.
+    """
+    connection_manager = connection_manager_dep.obtain(request)
+
+    return await system_logic.ping_db(connection_manager, readonly)