Add PNG and TIFF support v0.5

.env.example

@@ -10,6 +10,10 @@ APP_NAME=Photo Date Editor
 MAX_UPLOAD_MB=150
 LOG_LEVEL=INFO
 
+# Optional TIFF preview limits. The original TIFF is never converted or replaced by the preview.
+PREVIEW_MAX_EDGE=2400
+PREVIEW_MAX_PIXELS=300000000
+
 # Optional map/geocoder overrides. Existing .env files may omit these.
 # Map tiles are fetched by the backend and served same-origin to the browser.
 MAP_TILE_SOURCE_URL=https://tile.openstreetmap.org/{z}/{x}/{y}.png
@@ -19,4 +23,4 @@ DEFAULT_MAP_LON=11.0
 DEFAULT_MAP_ZOOM=5
 GEOCODER_URL=https://nominatim.openstreetmap.org/search
 # Optional custom identification sent to the geocoder. The default uses APP_NAME, version and APP_URL.
-# GEOCODER_USER_AGENT=MorkPhotoDateEditor/0.4.1 (+https://edit.mork.fyi)
+# GEOCODER_USER_AGENT=MorkPhotoDateEditor/0.5.0 (+https://edit.mork.fyi)