docker interactive shell
docker exec -it [containerid/name] [shell]
#Example
docker exec -it fa80b69 bash
#if its an apline container use "sh" instead of "bash"
how to bash into docker container
docker exec -it nginx /bin/bash
docker exec bash
//For executing commands in the container
docker exec -it <CONTAINER_NAME> bash
docker run command on container
sudo docker exec -it <container name> <command>
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 . .