Dockerfile to build in Flutter

Dockerfile

FROM ubuntu:20.04

ARG DEBIAN_FRONTEND=noninteractive

# Prerequisites
RUN apt update && apt install -y \
    curl \
    wget \
    git \
    unzip \
    xz-utils \
    zip \
    libglu1-mesa \
    openjdk-8-jdk \
    build-essential

# Setup new user
RUN useradd -ms /bin/bash developer
USER developer
WORKDIR /home/developer

# Prepare Android directories and system variables
RUN mkdir -p Android/Sdk
ENV ANDROID_SDK_ROOT /home/developer/Android/Sdk
RUN mkdir -p .android && touch .android/repositories.cfg

# Setup Android SDK [DEPRECATED]
RUN wget -O sdk-tools.zip https://dl.google.com/android/repository/sdk-tools-linux-4333796.zip
RUN unzip sdk-tools.zip && rm sdk-tools.zip
RUN mv tools Android/Sdk/tools
RUN cd Android/Sdk/tools/bin && yes | ./sdkmanager --licenses
RUN cd Android/Sdk/tools/bin && ./sdkmanager "build-tools;29.0.2" "patcher;v4" "platform-tools" "platforms;android-29" "sources;android-29"

# Download Flutter SDK
RUN git clone https://github.com/flutter/flutter.git
ENV PATH "$PATH:/home/developer/flutter/bin"

# Run basic check to download Dark SDK
RUN flutter doctor