[Docker-101] Tutorial 1

Task: To create a container to host HTML with Alpine version of Nginx.

Suppose we got a html file named index.html.

1. Create a Dockerfile

   FROM nginx:alpine
   COPY . /usr/share/nginx/html

   ls
   Dockerfile  index.html

2. Build a docker images

   $ docker build -t webserver:v1 .
   Sending build context to Docker daemon  3.072kB
   Step 1/2 : FROM nginx:alpine
   ---> 36f3464a2197
   Step 2/2 : COPY . /user/share/nginx/html
   ---> 028eb21675d7
   Successfully built 028eb21675d7
   Successfully tagged webserver:latest

   docker images
   REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
   webserver           v1                  028eb21675d7        6 minutes ago       18.6MB

3. Run the docker container

   docker run -d -p 80:80 webserver:v1

   When a container launches, it’s sandboxed from other processes and networks on the host. Therefore, we need to open and bind to a network port on the host by using -p <host-port>:<container-port>