✨(invitations) add invitation RSVP links in HTML emails (#10)

Also include many fixes and scalingo deployment

docker/files/development/etc/nginx/conf.d/default.conf

@@ -12,6 +12,23 @@ server {
         proxy_set_header X-Forwarded-Proto $scheme;
     }
 
+    # RSVP and iCal routes - proxy to Django backend
+    location /rsvp/ {
+        proxy_pass http://backend-dev:8000;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+    }
+
+    location /ical/ {
+        proxy_pass http://backend-dev:8000;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+    }
+
     # Frontend - proxy to Next.js dev server
     location / {
         proxy_pass http://frontend-dev:3000;

docker/sabredav/server.php

@@ -21,7 +21,7 @@ require_once __DIR__ . '/vendor/autoload.php';
 
 // Get base URI from environment variable (set by compose.yaml)
 // This ensures sabre/dav generates URLs with the correct proxy path
-$baseUri = getenv('CALENDARS_BASE_URI') ?: '/';
+$baseUri = getenv('CALDAV_BASE_URI') ?: '/';
 
 // Database connection from environment variables
 $dbHost = getenv('PGHOST') ?: 'postgresql';