Flutter Dev Container For GitHub CodeSpace / VS Code.

devcontainer.json

// For format details, see https://aka.ms/devcontainer.json. For config options, see the README at:
// https://github.com/microsoft/vscode-dev-containers/tree/v0.191.1/containers/codespaces-linux
{
	"name": "Flutter Dev environment (built on default Codespaces image)",
	"build": {
		"dockerfile": "Dockerfile"
	},
	"remoteUser": "codespace",
	"overrideCommand": false,
	"mounts": ["source=codespaces-linux-var-lib-docker,target=/var/lib/docker,type=volume"],
	"runArgs": [
		"--cap-add=SYS_PTRACE",
		"--security-opt",
		"seccomp=unconfined",
		"--privileged",
		"--init"
	],
	
	// Add the IDs of extensions you want installed when the container is created.
	"extensions": [
		"GitHub.vscode-pull-request-github",
		"dart-code.flutter",
		"dart-code.dart-code"
	],
	
	// Use 'forwardPorts' to make a list of ports inside the container available locally.
	"forwardPorts": [3000],

	// "oryx build" will automatically install your dependencies and attempt to build your project
	"postCreateCommand": "oryx build -p virtualenv_name=.venv --log-file /tmp/oryx-build.log --manifest-dir /tmp || echo 'Could not auto-build. Skipping.'"
}

Dockerfile

FROM mcr.microsoft.com/vscode/devcontainers/universal:1-focal

USER root

# [Optional] Uncomment this section to install additional OS packages.
# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
#     && apt-get -y install --no-install-recommends <your-package-list-here>

USER codespace

RUN mkdir /home/codespace/opt && cd /home/codespace/opt && git clone https://github.com/flutter/flutter.git -b stable && \
    wget https://dl.google.com/android/repository/commandlinetools-linux-7583922_latest.zip && \
    unzip commandlinetools-linux-7583922_latest.zip && \
    mkdir android-sdk && mkdir android-sdk/platform-tools && mkdir android-sdk/cmdline-tools && \
    mv cmdline-tools android-sdk/cmdline-tools/latest && \
    rm commandlinetools-linux-7583922_latest.zip

ENV PATH $PATH:/home/codespace/opt/flutter/bin
ENV ANDROID_SDK_ROOT /home/codespace/opt/android-sdk
ENV PATH $PATH:$ANDROID_SDK_ROOT/cmdline-tools/latest/bin
ENV PATH $PATH:$ANDROID_SDK_ROOT/platform-tools

RUN yes | sdkmanager --licenses && \
    sdkmanager --sdk_root=${ANDROID_SDK_ROOT} "platform-tools" "platforms;android-30" "build-tools;30.0.3" && \
    flutter config --android-sdk $ANDROID_SDK_ROOT && \
    flutter precache 

run.sh

#!/bin/bash
flutter run --release -d web-server --web-hostname=0.0.0.0 --web-port=3000