My FastApi apps won't start

latifs

PROOP

a year ago

Hi guys,

even though I have a solid Dockerfile and the deployment is successful the app respond with the Application failed to respond screen when it should be responding with a server is running message.

Do I need a different start command?

Here is my Dockerfile:

# Use Python 3.12 slim image as base
FROM python:3.12-slim

# Set working directory
WORKDIR /app

# Upgrade pip and install build tools
RUN pip install --no-cache-dir --upgrade pip setuptools wheel

# Copy requirements first to leverage Docker cache
COPY requirements.txt .

# Install Python dependencies
RUN pip install --no-cache-dir -r requirements.txt

# Create necessary directories
RUN mkdir -p /var/data

# Copy the rest of the application
COPY . .

# CMD will use PORT from environment or default to 8000
CMD ["sh", "-c", "uvicorn app:app --host 0.0.0.0 --port ${PORT:-8000}"]