fix: update Dockerfiles with metadata labels and improve build process

backend/Dockerfile

@@ -1,11 +1,23 @@
 # Use the official Python slim image as the base image
-FROM python:3.10-slim
+FROM python:3.13-slim
 
-LABEL Developers="Sean Morley"
+# Metadata labels for the AdventureLog image
+LABEL maintainer="Sean Morley" \
+      version="v0.9.0" \
+      description="AdventureLog — the ultimate self-hosted travel companion." \
+      org.opencontainers.image.title="AdventureLog" \
+      org.opencontainers.image.description="AdventureLog is a self-hosted travel companion that helps you plan, track, and share your adventures." \
+      org.opencontainers.image.version="v0.9.0" \
+      org.opencontainers.image.authors="Sean Morley" \
+      org.opencontainers.image.url="https://raw.githubusercontent.com/seanmorley15/AdventureLog/refs/heads/main/brand/banner.png" \
+      org.opencontainers.image.source="https://github.com/seanmorley15/AdventureLog" \
+      org.opencontainers.image.vendor="Sean Morley" \
+      org.opencontainers.image.created="$(date -u +'%Y-%m-%dT%H:%M:%SZ')" \
+      org.opencontainers.image.licenses="GPL-3.0"
 
 # Set environment variables
-ENV PYTHONDONTWRITEBYTECODE 1
-ENV PYTHONUNBUFFERED 1
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
 
 # Set the working directory
 WORKDIR /code

backend/server/adventures/views/stats_view.py

@@ -14,7 +14,7 @@ class StatsViewSet(viewsets.ViewSet):
     """
     A simple ViewSet for listing the stats of a user.
     """
-    @action(detail=False, methods=['get'], url_path='counts/(?P<username>[\w.@+-]+)')
+    @action(detail=False, methods=['get'], url_path=r'counts/(?P<username>[\w.@+-]+)')
     def counts(self, request, username):
         if request.user.username == username:
             user = get_object_or_404(User, username=username)

backend/server/requirements.txt

@@ -10,7 +10,7 @@ Pillow
 whitenoise
 django-resized
 django-geojson
-setuptools
+setuptools<81
 gunicorn==23.0.0
 qrcode==8.0
 slippers==0.6.2