Can't find module error when building docker image

Question

I want to run a NodeJS script when building the docker image, it works fine locally.

Here is my docker image:

WORKDIR /usr/src/app

# Installing dependencies
COPY package.json *yarn* .npmrc ./
RUN yarn install
# Running Excel to JSON script

# Copy working directory to container
COPY . .

RUN node importExcel.js
# Building app
RUN yarn build

EXPOSE 3000

# Running the app
CMD [ "yarn", "start" ]

I get this error when building the image:

Step 14/17 : RUN node importExcel.js
 ---> Running in 8d666299a084
node:internal/modules/cjs/loader:936
  throw err;
  ^
Error: Cannot find module '/usr/src/app/importExcel.js'
    at Function.Module._resolveFilename (node:internal/modules/cjs/loader:933:15)
    at Function.Module._load (node:internal/modules/cjs/loader:778:27)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:77:12)
    at node:internal/main/run_main_module:17:47 {
  code: 'MODULE_NOT_FOUND',
  requireStack: []
}
Removing intermediate container 8d666299a084
The command '/bin/sh -c node importExcel.js' returned a non-zero code: 1

I get this error even though the file is located in /usr/src/app/ .

Answer 1

Make sure that you really copied your files. Try RUN ls -la before you start node command