This is a simple instant messenger/social media app with a minimalist design (material you), with authentication, where registered users can find themselves friends, chat with them, create stories and find each other on the map. Every message is end-to-end encrypted and there is no persistent storage* of messages on the backend api.

Mobile app:

• Flutter framework (Dart)
• Libsignal protocol for end-to-end encryption
• Bloc state management

Api:

• NestJs framework (TypeScript)
• MongoDb with Mongoose
• Future: Firebase Cloud Messaging (push notifications)

1. Pull the images

docker pull mongo:latest
docker pull fsblaise/blizz-chat-backend:latest

2. Create docker network locally

docker network create ${NETWORK_NAME}

3. Run mongodb container

docker run -d --name ${MONGODB_CONTAINER_NAME} --network ${NETWORK_NAME} -e MONGO_INITDB_ROOT_USERNAME=${username} -e MONGO_INITDB_ROOT_PASSWORD=${password} -p 27017:27017 -v ./mongo-data:/data/db mongo:latest

4. Run backend container

docker run -d --name ${BACKEND_CONTAINER_NAME} -p 3000:3000 --network ${NETWORK_NAME} -e DB_URI=mongodb://${username}:${password}@${MONGODB_CONTAINER_NAME}:27017 -e JWT_SECRET=${CUSTOM_SECRET} fsblaise/blizz-chat-backend:latest

Backend url: http://localhost:3000
Db url: mongodb://${username}:${password}@localhost:27017

Api (requires nodejs 20):

cd backend
docker compose up
npm i
npm run start

Frontend (requires nodejs 20):

cd frontend
npm i
npm run start

Mobile app (requires flutter version 3.22.2)

cd mobile_new
flutter pub add
flutter run

*Persistent storage: Messages are only cached in a queue, if the websocket connection is not live with the recipient of the message. As soon as the recipient is connected via websocket, every message is being sent.