refactor(e2e): migrate to production Dockerfile for E2E tests

Complete E2E Docker migration (Steps 1-3):

1. Add SPA routing support in nginx (try_files directive)
2. Make APP_PORT configurable via environment variable
3. Migrate docker-compose.e2e.yaml from dev server to production build

Changes:
- docker-compose.e2e.yaml: Use production Dockerfile instead of dev server
  - Remove volume mounts (self-contained production build)
  - Add UNSPLASH build args
  - Add WEBDAV_BACKEND environment variable
  - Reduce healthcheck start_period from 120s to 30s (nginx is faster)
- nginx/default.conf.template: Add try_files for SPA routing, use APP_PORT
- docker-entrypoint.sh: Export APP_PORT with default value

Benefits:
- Production build provides more realistic test environment
- Faster startup (30s vs 120s)
- No dependency on local node_modules
- Matches production deployment more closely

docker-compose.e2e.yaml

@@ -4,26 +4,26 @@
 #
 # FAST LOCAL ALTERNATIVE: Run `ng serve` locally + `npm run e2e:webdav` (only webdav in Docker)
 services:
-  # Angular development server for E2E tests
-  # Uses volume mount to avoid copying/rebuilding node_modules
-  # Requires: npm install to be run locally first
+  # Production Angular build for E2E tests
+  # Uses production Dockerfile with nginx
   app:
     build:
       context: .
-      dockerfile: Dockerfile.e2e.dev.fast
+      dockerfile: Dockerfile
+      args:
+        UNSPLASH_KEY: ${UNSPLASH_KEY:-DUMMY_UNSPLASH_KEY}
+        UNSPLASH_CLIENT_ID: ${UNSPLASH_CLIENT_ID:-DUMMY_UNSPLASH_CLIENT_ID}
     ports:
       - '${APP_PORT:-4242}:${APP_PORT:-4242}'
     environment:
       - APP_PORT=${APP_PORT:-4242}
-    volumes:
-      - .:/app
-      - /app/.angular # Exclude .angular cache (use container's)
+      - WEBDAV_BACKEND=${WEBDAV_BACKEND:-}
     healthcheck:
       test: ['CMD', 'curl', '-sf', 'http://localhost:${APP_PORT:-4242}']
       interval: 10s
       timeout: 5s
       retries: 30
-      start_period: 120s
+      start_period: 30s
 
   # WebDAV sync server (for sync tests)
   webdav:

docker-entrypoint.sh

@@ -1,5 +1,9 @@
 #!/bin/sh
 
+# Set default port if not provided
+: "${APP_PORT:=80}"
+export APP_PORT
+
 # Generate ./assets/sync-config-default-override.json from environment variables
 JSON="{}"
 JSON_PATH=./assets/sync-config-default-override.json

nginx/default.conf.template

@@ -4,13 +4,14 @@ map "" $webdav_backend {
 }
 
 server {
-    listen       80;
+    listen       ${APP_PORT};
     server_name  localhost;
 
     # serve super-productivity as static files at the path /
     location / {
         root   /usr/share/nginx/html;
         index  index.html index.htm;
+        try_files $uri $uri/ /index.html;
     }
 
     # forward requests starting with "/webdav/" to $WEBDAV_BACKEND