Docker container throwing error on running it

Question

I have been learning docker for now, i made a docker file which is like this.

FROM node:10

# Create app directory
WORKDIR /app

# Install app dependencies
# A wildcard is used to ensure both package.json AND package-lock.json are copied
# where available (npm@5+)
COPY package*.json /app/

RUN npm install
# If you are building your code for production
# RUN npm ci --only=production

# Bundle app source
ADD ./* /app/

EXPOSE 8080
CMD [ "npm", "start" ]

And my file directory looks like this,

My server is working fine with my local machine, however, when running with docker container it's throwing an error. The error is:

Can someone help me with it ?

Answer 1

Update the Dockerfile to the following and try:

FROM node:10

# Create app directory
WORKDIR /app/

# RUN apt-get update && apt-get install -y --no-install-recommends nano

# Install app dependencies
# A wildcard is used to ensure both package.json AND package-lock.json are copied
# where available (npm@5+)
COPY package*.json ./

# RUN npm install
# If you are building your code for production
RUN npm install --only=production

COPY . .

CMD ["node", "server.js"]

EXPOSE 8080

When you set WORKDIR to /app/, the current directory is updated. So there no need to mention /app during copy.

Answer 2

ADD ./* /app/ does not what you probably think it does. It matches all files that satisfy ./* according to Go's filepath match (docs) and copies them to /app/. For details, see this answer.

What you should do instead is add . /app/ or add . . (which are equivalent, because you changed the workdir to /app). That recurisvely copies the contents of your current directory into the container fileysystem, maintaining the directory structure.