Add local dynamo script

Author: zxdong262

.gitignore

@@ -133,3 +133,7 @@ dist
 .vercel
 /public
 .DS_Store
+bin/DynamoDBLocal_lib
+dynamodb-local-metadata.json
+shared-local-instance.db
+bin/DynamoDBLocal.jar

bin/init-local-dynamodb.sh

@@ -0,0 +1,69 @@
+#!/bin/bash
+
+# Script to initialize and run local DynamoDB
+# Checks for required dependencies and downloads/runs DynamoDB Local
+
+set -e
+
+DYNAMODB_DIR="$(dirname "$0")"
+DYNAMODB_TAR="$DYNAMODB_DIR/dynamodb_local_latest.tar.gz"
+DYNAMODB_JAR="$DYNAMODB_DIR/DynamoDBLocal.jar"
+DYNAMODB_LIB="$DYNAMODB_DIR/DynamoDBLocal_lib"
+
+# Check for Java
+if ! java -version >/dev/null 2>&1; then
+    echo "Error: Java is not properly installed or not in PATH."
+    echo "Please install Java 8 or later from https://adoptium.net/ or using Homebrew: 'brew install openjdk'"
+    exit 1
+fi
+
+# Check Java version (optional, but informative)
+JAVA_VERSION=$(java -version 2>&1 | head -n 1)
+echo "Java found: $JAVA_VERSION"
+
+# Check if DynamoDB Local is already downloaded
+if [ ! -f "$DYNAMODB_JAR" ]; then
+    echo "DynamoDB Local not found. Downloading..."
+    
+    # Download the latest DynamoDB Local
+    if ! curl -L -o "$DYNAMODB_TAR" "https://s3.us-west-2.amazonaws.com/dynamodb-local/dynamodb_local_latest.tar.gz"; then
+        echo "Error: Failed to download DynamoDB Local."
+        exit 1
+    fi
+    
+    # Extract the archive
+    if ! tar -xzf "$DYNAMODB_TAR" -C "$DYNAMODB_DIR"; then
+        echo "Error: Failed to extract DynamoDB Local archive."
+        exit 1
+    fi
+    
+    # Clean up the tar file
+    rm "$DYNAMODB_TAR"
+    
+    echo "DynamoDB Local downloaded and extracted successfully."
+else
+    echo "DynamoDB Local is already downloaded."
+fi
+
+# Check if DynamoDB Local is already running (on default port 8000)
+if lsof -Pi :8000 -sTCP:LISTEN -t >/dev/null 2>&1; then
+    echo "DynamoDB Local is already running on port 8000."
+else
+    echo "Starting DynamoDB Local..."
+    
+    # Start DynamoDB Local in the background
+    java -Djava.library.path="$DYNAMODB_LIB" -jar "$DYNAMODB_JAR" -sharedDb &
+    
+    # Wait for it to start (DynamoDB Local may take a few seconds)
+    echo "Waiting for DynamoDB Local to start..."
+    sleep 5
+    
+    # Verify it's running
+    if lsof -Pi :8000 -sTCP:LISTEN -t >/dev/null 2>&1; then
+        echo "DynamoDB Local started successfully on port 8000."
+    else
+        echo "Warning: DynamoDB Local may not have started properly. Check for errors above."
+    fi
+fi
+
+echo "Local DynamoDB initialization complete."

bin/stop-local-dynamodb.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+# Script to stop local DynamoDB
+
+echo "Stopping DynamoDB Local..."
+
+# Find and kill the DynamoDB Local process
+if pgrep -f "DynamoDBLocal.jar" >/dev/null; then
+    pkill -f "DynamoDBLocal.jar"
+    echo "DynamoDB Local stopped."
+else
+    echo "DynamoDB Local is not running."
+fi