Error response from daemon: Dockerfile parse error line 1: unknown instruction: #

Question

Im new to docker and trying to learn it. Im following this tutorial: https://docs.docker.com/get-started/part2/#apppy

So I installed Docker on Windows. Created 3 fil

Answer 1

I experienced this issue when working on a React app setup on Docker.

Sending build context to Docker daemon 1.143MB

Error response from daemon: Dockerfile parse error line 1: unknown instruction: +#

Here's how I solved it

The issue was that I had another file named Dockerfile (capital case D) which had some instructions in it, and it was conflicting with the original dockerfile (lower case d) in my project root directory.

I fixed this by deleting the Dockerfile and running the command:

docker build t myapp:latest .

to build the docker image from the dockerfile instead.

That's all.

I hope this helps