Docker Deployment Made Simple: A Complete Guide

Docker packages your app into a portable container. Here’s how to deploy one.

Create a Dockerfile

FROM node:20-alpine
WORKDIR /app
COPY package*.json ./
RUN npm ci --only=production
COPY . .
EXPOSE 3000
CMD ["node", "index.js"]

Python Example

FROM python:3.12-slim
WORKDIR /app
COPY requirements.txt .
RUN pip install -r requirements.txt
COPY . .
EXPOSE 5000
CMD ["python", "app.py"]

Test Locally

docker build -t my-app .
docker run -p 3000:3000 my-app

Deploy to Remoud

1. Push code with Dockerfile to GitHub
2. Select repo in Remoud, choose Dockerfile build type
3. Click Deploy

Best Practices

• Use alpine base images
• Use .dockerignore
• Never hardcode secrets
• Pin base image versions