Update Dockerfile

Dockerfile

@@ -1,4 +1,4 @@
-# docker build -t hapticlink .
+# sudo docker build --build-arg WS_SERVER_URL=ws://localhost:3000 -t hapticlink .
 # docker run --name hapticlink -d -p 3000:3000 -e WS_SERVER_URL="ws://localhost:3000" hapticlink
 
 # Automatically run by hugging face when main get update
@@ -7,6 +7,10 @@
 # Build Flutter Project
 FROM cirrusci/flutter:latest AS flutter-builder
 
+# Define an ARG for the WS_SERVER_URL
+ARG WS_SERVER_URL=ws://localhost:3000
+ENV WS_SERVER_URL=${WS_SERVER_URL}
+
 WORKDIR /client
 
 # Copies flutter project
@@ -14,7 +18,7 @@ COPY ./client /client
 
 # Building project
 RUN flutter pub get
-RUN flutter build web
+RUN flutter build web --dart-define=WS_SERVER_URL=${WS_SERVER_URL}
 
 # STAGE 2
 # Install Node Server
@@ -38,6 +42,7 @@ EXPOSE 3000
 ENV NODE_ENV=production
 
 WORKDIR /server
+
 # Copies build files from client and server
 COPY --from=node-builder /server /server
 COPY --from=flutter-builder /client/build/web /client/build/web