[nominatim-web] Bump to python 3.10

[Bartłomiej Piotrowski <bpiotrowski src gnome org>]

commit 9b856af347f0b0e41a50533dec746018ad060ee6
Author: Bartłomiej Piotrowski <bpiotrowski gnome org>
Date:   Sun Feb 6 16:27:19 2022 +0100

    Bump to python 3.10

 Dockerfile       |  7 +++----
 requirements.txt | 15 ---------------
 2 files changed, 3 insertions(+), 19 deletions(-)
---
diff --git a/Dockerfile b/Dockerfile
index 848bdb0..af60f30 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,15 +1,14 @@
-FROM python:3.9 as builder
+FROM python:3.10 as builder
 
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
         build-essential libpq-dev
 
-ADD requirements.txt /requirements.txt
 RUN python -m venv /venv && \
-    /venv/bin/pip install -r requirements.txt \
+    /venv/bin/pip install fastapi uniqorn requests redis hiredis psycopg2
     && rm -f /requirements.txt
 
-FROM python:3.9-slim
+FROM python:3.10-slim
 
 EXPOSE 8000