Add in .env.example for setting ports, fix upload limit, fix bounding box, can now dismiss previous image, change markdown expectation to HTML - not MD. updated README with nvidia driver/container instructions

.env.example

@@ -0,0 +1,20 @@
+# DeepSeek OCR Application Configuration
+
+# API Configuration
+API_HOST=0.0.0.0
+API_PORT=8000
+
+# Frontend Configuration
+FRONTEND_PORT=3000
+
+# Model Configuration
+MODEL_NAME=deepseek-ai/DeepSeek-OCR
+HF_HOME=/models
+
+# Upload Configuration
+MAX_UPLOAD_SIZE_MB=100
+
+# Processing Configuration
+BASE_SIZE=1024
+IMAGE_SIZE=640
+CROP_MODE=true