Docker 101

This is the repository for simple Docker exercises. You can find the answers under branch answers.

Exercise 1

1. Add two files into folder cmd/: Dockerfile and index.js.
2. To index.js, add printing the first command-line parameter in format "Hello ${param}!".
3. Write a Dockerfile that runs that file (as an entrypoint).
4. Add a command-line parameter to the Docker command execution and make sure it prints "Hello ${param}!", e.g. "Hello world!".

Exercise 2

1. Add three files into folder server/: Dockerfile, package.json and app.js.
2. Add koa to package.json.
3. Install npm dependencies.
4. Make server.js answer to endpoint / and return "Hello world".
5. Add node, package.json and app.js to Dockerfile.
6. Run server using Docker.

Exercise 3

1. Create docker-compose.yml that includes postgres database.
2. Run backend using Docker Compose.