data: add DO photos, upload archive, and backend .env

Force-added: these paths are gitignored, so they stay ignored for new files
unless added the same way. Committed on request so the working data is not
lost during the migration off this machine.

backend/.env

@@ -0,0 +1,11 @@
+# Port to serve the application on the host (routed via Nginx)
+APP_PORT=8000
+
+# GPU index to allocate (e.g. 0, 1, or 0,1)
+CUDA_VISIBLE_DEVICES=0
+
+# Run layout parser pipeline on GPU since vLLM VRAM allocation has been tuned/reduced
+PIPELINE_DEVICE=gpu:0
+
+# Secret used to sign/verify account login JWTs (dev-only value; replace for any real deployment)
+JWT_SECRET=dev-only-insecure-secret-change-me