Update for documentation and config of repo location

.env.example

@@ -0,0 +1,24 @@
+# Docker Registry Browser Environment Configuration
+# Copy this file to .env and update with your values
+
+# Registry host and port (without protocol)
+REGISTRY_HOST=your-registry.example.com:5000
+
+# Protocol to use for registry connection
+REGISTRY_PROTOCOL=https
+
+# Optional: Registry authentication
+REGISTRY_USERNAME=your-username
+REGISTRY_PASSWORD=your-password
+
+# Development Examples:
+# For local registry: REGISTRY_HOST=localhost:5000
+# For Harbor: REGISTRY_HOST=harbor.example.com
+# For Docker Hub: REGISTRY_HOST=registry-1.docker.io (not typically needed)
+# For AWS ECR: REGISTRY_HOST=123456789012.dkr.ecr.us-west-2.amazonaws.com
+
+# Development Usage:
+# 1. Copy this file: cp .env.example .env
+# 2. Edit .env with your registry details
+# 3. Start development server: npm start
+# 4. Or use convenience scripts: ./start-dev.sh