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Development Tools Introduction to Docker Why Docker? Why Should You Use Docker?

Lonie Messer
Lonie Messer
4,910 Points

COPY failed: file not found in build context or excluded by .dockerignore: stat app.py: file does not exist

I get an error when I run the docker build command. lucard@USHA:~/MyDockerContainers/PythonWebServer$ docker build -t web-app . Sending build context to Docker daemon 2.048kB Step 1/9 : FROM ubuntu:latest ---> 27941809078c Step 2/9 : RUN apt-get update -y ---> Using cache ---> 35c89d12da8c Step 3/9 : RUN apt-get install -y python3 ---> Using cache ---> 923ed7428ee3 Step 4/9 : ENTRYPOINT ["python3"] ---> Using cache ---> e8e28a145519 Step 5/9 : CMD ["app.py"] ---> Using cache ---> 92a2d00bfe4e Step 6/9 : WORKDIR /app ---> Using cache ---> 2715748c5744 Step 7/9 : COPY app.py app.py COPY failed: file not found in build context or excluded by .dockerignore: stat app.py: file does not exist

This is my Dockerfile

Dockerfile for building a Python web service

Pull base image.

FROM ubuntu:latest

Commands to run to install dependencies

RUN apt-get update -y RUN apt-get install -y python3

When you pass commands to the container, what should interpert them

ENTRYPOINT ["python3"]

Coomand to run when the container starts.

CMD ["app.py"]

Working directory.

WORKDIR /app

Copy apps from the local folder to the Docker Container

COPY app.py app.py COPY alternate.py alternate.py

Expose ports.

EXPOSE 8080