how to run a dockerfile code example

Example 1: docker compose run

# One single docker-compose.yml file
docker-compose up --build -d --remove-orphans

# Specify docker-compose.yml file to run
docker-compose -f docker-compose.yml up --build -d --remove-orphans

Example 2: how run dockerfile

# Use the official image as a parent image.
FROM node:current-slim

# Set the working directory.
WORKDIR /usr/src/app

# Copy the file from your host to your current location.
COPY package.json .

# Run the command inside your image filesystem.
RUN npm install

# Inform Docker that the container is listening on the specified port at runtime.
EXPOSE 8080

# Run the specified command within the container.
CMD [ "npm", "start" ]

# Copy the rest of your app's source code from your host to your image filesystem.
COPY . .

Example 3: start a docker container

$ docker start <container_id>

Example 4: dockerfile run app cmd

RUN apt-get install python3
CMD echo "Hello world"
ENTRYPOINT echo "Hello world"