diff --git a/build.sh b/build.sh
old mode 100644
new mode 100755
index 2aba883..6128dda
--- a/build.sh
+++ b/build.sh
@@ -1,4 +1,26 @@
-flutter build web \
-  --dart-define=APPWRITE_PROJECT_ID="$APPWRITE_PROJECT_ID" \
-  --dart-define=APPWRITE_PROJECT_NAME="$APPWRITE_PROJECT_NAME" \
-  --dart-define=APPWRITE_PUBLIC_ENDPOINT="$APPWRITE_PUBLIC_ENDPOINT"
\ No newline at end of file
+#!/bin/bash
+
+# Check if .env file exists
+if [ ! -f .env ]; then
+  echo "Error: .env file not found!"
+  exit 1
+fi
+
+# Read .env file and convert it to --dart-define arguments
+ARGS=""
+while IFS='=' read -r key value || [ -n "$key" ]; do
+  # Ignore empty lines and comments
+  if [[ -n "$key" && ! "$key" =~ ^# ]]; then
+    ARGS+=" --dart-define=${key}=\"${value}\""
+  fi
+done < .env
+
+# Build Flutter web
+eval flutter build web "$ARGS"
+
+# If --preview flag is provided, run a local preview server
+if [ "$1" == "--preview" ]; then
+  echo "Starting preview server at http://localhost:3000..."
+  cd build/web || exit 1
+  python3 -m http.server 3000
+fi