[FIX]Add redoc url redirect /docs to /docs/

Merge pull request #416 from annuaire-entreprises-data-gouv-fr/fix-endpoint-doc

app/main.py

@@ -2,6 +2,7 @@
 from elasticapm.contrib.starlette import ElasticAPM, make_apm_client
 from elasticsearch_dsl import connections
 from fastapi import FastAPI, Request
+from fastapi.responses import RedirectResponse
 
 from app.config import (
     APM_CONFIG,
@@ -62,6 +63,12 @@ def custom_openapi():
 add_exception_handlers(app)
 
 
+# Redirect /docs to /docs/
+@app.get("/docs", include_in_schema=False)
+async def docs_redirect():
+    return RedirectResponse(url="/docs/")
+
+
 # Catch-all route for 404 errors
 @app.api_route("/{path_name:path}", methods=["GET", "POST", "PUT", "DELETE"])
 async def catch_all(request: Request, path_name: str):