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Docker

Local development (backend only)​

The backend repo includes a docker-compose.yml that starts a PostgreSQL instance alongside the API.

git clone git@github.com:Webrowse/feature-flag-service-backend.git
cd feature-flag-service-backend

# Copy and configure the environment file
cp .env.example .env

Edit .env:

DATABASE_URL=postgres://postgres:postgres@localhost:5432/featureflags
JWT_SECRET=<generate with: openssl rand -base64 48>
PORT=8080
ALLOWED_ORIGIN=http://localhost:3000
# Start PostgreSQL
docker-compose up -d

# Install the SQLx CLI and run migrations
cargo install sqlx-cli --no-default-features --features postgres
sqlx migrate run

# Start the API
cargo run

The API is now running at http://localhost:8080.

Building the Docker image​

docker build -t feature-flag-backend .

The Dockerfile uses a multi-stage build: a Rust builder stage compiles the binary, and a minimal Debian runtime image runs it.

docker run \
  -e DATABASE_URL="postgres://user:pass@host:5432/db" \
  -e JWT_SECRET="your-secret-here" \
  -e PORT=8080 \
  -p 8080:8080 \
  feature-flag-backend

Frontend​

git clone git@github.com:Webrowse/feature-flag-service-frontend.git
cd feature-flag-service-frontend

docker build \
  --build-arg VITE_API_URL=http://localhost:8080 \
  -t feature-flag-frontend .

docker run -p 3000:3000 feature-flag-frontend

The frontend is served by Caddy, which handles SPA fallback routing automatically.

Running both together​

Create a docker-compose.yml in a parent directory:

docker-compose.yml
services:
  db:
    image: postgres:16
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: postgres
      POSTGRES_DB: featureflags
    volumes:
      - pgdata:/var/lib/postgresql/data

  api:
    build: ./feature-flag-service-backend
    environment:
      DATABASE_URL: postgres://postgres:postgres@db:5432/featureflags
      JWT_SECRET: ${JWT_SECRET}
      PORT: 8080
      ALLOWED_ORIGIN: http://localhost:3000
    ports:
      - "8080:8080"
    depends_on:
      - db

  frontend:
    build:
      context: ./feature-flag-service-frontend
      args:
        VITE_API_URL: http://localhost:8080
    ports:
      - "3000:3000"
    depends_on:
      - api

volumes:
  pgdata:
JWT_SECRET=$(openssl rand -base64 48) docker-compose up

Run migrations once after the first start:

docker-compose exec api sqlx migrate run