add Lambda python implementation

serverless/aws/create_lambda_function.py

@@ -0,0 +1,20 @@
+import argparse
+import os
+import zipfile
+import sys
+
+parser = argparse.ArgumentParser(
+    description="Create a deployment-ready PMTiles Lambda zip."
+)
+parser.add_argument("region", help="AWS Region of the S3 bucket.")
+parser.add_argument("bucket", help="S3 Bucket Name.")
+args = parser.parse_args()
+
+with zipfile.ZipFile("lambda_function.zip", "w", zipfile.ZIP_DEFLATED) as z:
+    z.write("lambda_function.py")
+    z.write("../../python/pmtiles/reader.py", "pmtiles.py")
+    info = zipfile.ZipInfo("config.py")
+    info.external_attr = 0o777 << 16
+    z.writestr(info, f'REGION="{args.region}"\nBUCKET="{args.bucket}"')
+
+print(f"created lambda_function.zip with REGION {args.region} and BUCKET {args.bucket}")