Docker containers says You are not inside a Hardhat project

[yegor256]

This is my Dockerfile:

FROM node:22
WORKDIR /app
EXPOSE 8545
COPY . hardhat.config.ts
RUN npm install -g hardhat

This is hardhat.config.ts in the same directory and I don't have any other files here:

module.exports = {
  solidity: "0.8.28",
};

Then, I run npm install -g [email protected] on the host machine. Then, I run npx hardhat node in this directory, on the host machine, it works correctly.

However, when I do docker build . -t hh first and then docker run hh npx hardhat node, I'm getting this:

Error HH1: You are not inside a Hardhat project.

Why? How to fix?

[yegor256]

It was a bug in my Dockerfile