arkadiyshin / docker-get-started

DOCKER CUSTOM INSTRUCTIONS

STEP 1

find required for the project docker image

run [image_name]: searches for a local image by name, if not found, downloads from dockerhub and then runs

docker run node
 
# interactive mode
docker run -it node 

see running containers

docker ps

see all the containers

docker ps -a

STEP 2

create Dockerfile in the root of the project.

Simple sample docker file

FROM node
 
# change working directory like cd command in terminal
WORKDIR /app 

COPY package.json /app

# run the command for installing dependencies
RUN npm install

# copy all files from project directory to the container
COPY . /app 
  
# [optional] information about shared port from container
EXPOSE 80
 
# run the command to runnig our programm
# the difference from the RUN command is that 
# CMD is executed only after the container has been built and started
CMD ["npm", "start"]

STEP 3

create our own custom image

build -t[name:tag] [path to Dockerfile]

docker build .

STEP 4

run custom container

docker run -p [local port]:[expoused port] -d -name -rm [image_name or image_id] -p parametr matches local port and expoused port -rm parametr deletes container after stopping -d parametr runs container in detached mode (attached mode by the default)

stop a running container

docker stop [container_name or container_id]

run a stopping container

docker start -a [container_name or container_id] -a parametr runs container in attached mode (detached mode by the default)

attach running container

docker attach [container_name or container_id]

STEP 5

delete images and containers

docker rmi [image_name or image_id] docker rm [container_name or container_id]

delete all images

docker image prune

STEP 6

share images

create new repository in dockerhub

rename your local repository with dockerhub name

docker tag [local-image:tagname] [new-repo:tagname]

push your local image to dockerhub

docker push [new-repo:tagname]

for pushing into dockerhub you need to authorize

docker login you will stay loged in

for logout

docker logout

VOLUME ["/app/feedback"]

VOLUMES

docker volume ls

named volume for the data -v feedback:/app/feedback

bind mounts (for nodemon) -v "project folder path:/app:ro

anonymous volume to protect data -v /app/node_modules