I have a flutter web app and I need to deploy but I can't build

# Environemnt to install flutter and build web
FROM debian:latest AS build-env

# install all needed stuff
RUN apt-get update
RUN apt-get install -y curl git unzip

# define variables
ARG FLUTTER_SDK=/usr/local/flutter
ARG APP=/app

#clone flutter
RUN git clone https://github.com/flutter/flutter.git $FLUTTER_SDK
# change dir to current flutter folder and make a checkout to the specific version
RUN cd $FLUTTER_SDK && git checkout efbf63d9c66b9f6ec30e9ad4611189aa80003d31

# setup the flutter path as an enviromental variable
ENV PATH="$FLUTTER_SDK/bin:$FLUTTER_SDK/bin/cache/dart-sdk/bin:${PATH}"

# Start to run Flutter commands
# doctor to see if all was installes ok
RUN flutter doctor -v

# create folder to copy source code
RUN mkdir $APP
# copy source code to folder
COPY . $APP
# stup new folder as the working directory
WORKDIR $APP

# Run build: 1 - clean, 2 - pub get, 3 - build web
RUN flutter clean
RUN flutter pub get
RUN flutter build web

# Environemnt to install flutter and build web
FROM debian:latest AS build-env

# install all needed stuff
RUN apt-get update
RUN apt-get install -y curl git unzip

# define variables
ARG FLUTTER_SDK=/usr/local/flutter
ARG APP=/app

#clone flutter
RUN git clone https://github.com/flutter/flutter.git $FLUTTER_SDK
# change dir to current flutter folder and make a checkout to the specific version
RUN cd $FLUTTER_SDK && git checkout efbf63d9c66b9f6ec30e9ad4611189aa80003d31

# setup the flutter path as an enviromental variable
ENV PATH="$FLUTTER_SDK/bin:$FLUTTER_SDK/bin/cache/dart-sdk/bin:${PATH}"

# Start to run Flutter commands
# doctor to see if all was installes ok
RUN flutter doctor -v

# create folder to copy source code
RUN mkdir $APP
# copy source code to folder
COPY . $APP
# stup new folder as the working directory
WORKDIR $APP

# Run build: 1 - clean, 2 - pub get, 3 - build web
RUN flutter clean
RUN flutter pub get
RUN flutter build web