COPY failed: file not found in build context or excluded by .dockerignore: stat build/libs/my-app-1.0-SNAPSHOT.jar: file does not exist code example

Example: COPY failed: file not found in build context or excluded by .dockerignore: stat package.json: file does not exist

WORKDIR /usr/src/companies
COPY . ./usr/src/companies/ - working
COPY . ./usr/src/companies - not working