Merge pull request 'fix docker file flutter' (#38) from v.1.2.7 into main

Reviewed-on: #38

mih_ui/Dockerfile

@@ -7,7 +7,7 @@ RUN apt-get update && apt-get install -y \
 	&& rm -rf /var/lib/apt/lists/*
 
 # Clone Flutter SDK 
-RUN git clone -b stable https://github.com/flutter/flutter.git /usr/local/flutter
+RUN git clone -b stable --depth 1 https://github.com/flutter/flutter.git /usr/local/flutter
 ENV PATH="/usr/local/flutter/bin:/usr/local/flutter/bin/cache/dart-sdk/bin:${PATH}"
 
 # Build the Flutter web app