code for docker posts on nodejs
this folder contains an example for the absolute most basic node process
inside of a container. you can cd into that directory and run the following
commands:
docker-compose build basic
docker-compose up
this folder contains a Dockerfile that starts FROM a base node:8.9.4 image instead of Ubuntu and going through the installing of curl, NVM, node, etc. It also volume mounts the server.js file into the container and has nodemon watch the file, from inside the container, so that when we save changes it reloads and restarts the server process. The commands dont change.
Exposes the 9229 debug port for node inside the container as well as via the npm start command to allow us to set breakpoints in the nodejs code while still just running inside the container. This is where we make use of the launch.json file.
This creates a new service but we reference a published image to Docker Hub instead of making our own Dockerfile. We use knex and pg to try and connect to it in server.js but are unable to because localhost is not the same in a container as on our Mac.
Allows us to pass in environment variables to our server.js file so that it can connect to the postgres container
Prevents those pesky warnings about Postgres not being up by specifying a healthcheck to the postgres container and that our basic service depends_on the postgres container being in a service_healthy state