demo app - developing with Docker

This demo app shows a simple user profile app set up using

• index.html with pure js and css styles
• nodejs backend with express module
• mongodb for data storage

All components are docker-based

With Docker

With Dockerfile (Contenerized App)

Step 0: download the app from github repo https://github.com/DevWL/mongodb-express-js-app-basic-setup

To start the application

Step 0: Create docker network

docker network create mongo-network 

Step 1: Get the app from the GitHub repo.

Step 2: cd to the project dir (where the Dockerfile is placed).

Step 3: copy & run: docker rm -f mongodb && docker run -d -p 27017:27017 -e MONGO_INITDB_ROOT_USERNAME=root -e MONGO_INITDB_ROOT_PASSWORD=root --net mongo-network --name mongodb mongo docker rm -f mongo-express && docker run -d -p 8081:8081 -e ME_CONFIG_MONGODB_ENABLE_ADMIN=true -e ME_CONFIG_MONGODB_ADMINUSERNAME=root -e ME_CONFIG_MONGODB_ADMINPASSWORD=root -e ME_CONFIG_MONGODB_SERVER=mongodb --net mongo-network --name mongo-express mongo-express docker rm -f nxapp && docker build -t nxapp . && docker run -p 3000:3000 -di --name nxapp --net mongo-network nxapp The last line above basically: removes old container (if exists) -> builds image (nxapp) -> run new app container (nxapp)

NOTE: creating docker-network in optional. You can start both containers in a default network. In this case, just emit --net flag in docker run command

Step 4: open mongo-express from browser On Windows:

http://localhost:8081

Step 5: create user-account db and users collection in mongo-express

Step 6: Start your nodejs application locally - go to app directory of project

npm install 
node server.js

Step 7: Access you nodejs application UI from browser

http://localhost:3000

With Docker Compose

To start the application

Step 1: start mongodb and mongo-express

docker compose -f up

You can access the mongo-express under localhost:8080 from your browser

Step 2: in mongo-express UI - create a new database "my-db"

Step 3: in mongo-express UI - create a new collection "users" in the database "my-db"

Step 4: access the nodejs application from browser

http://localhost:3000

To build a docker image from the application

push the docker image to your docker repo

The dot "." at the end of the command denotes location of the Dockerfile.

run the app from the image

Run app from the docker hub image instead of pulling it from git repo

change the code

... do something to your app

rebuild the image

cd <project directory> (where Dockerfile is placed)
docker build -t nxapp:1.0.0 . 

Push image to back to repo

docker push <local-image> <user-name>:<remote-image-name>
docker push nxapp:1.0.0 devwl:nxapp:1.0.0

Volumens

Presist database file in image.

Export datasbase file

This aproach will allow to migrate between different database engine versions. 

Keep database files in app image

Mount volume under docker/mongodb/data for that specyfic database engine version.
NOTE that you need to define specyfic mongodb version to not run in to the file conflict when building containers.

Src

Watch: https://youtu.be/3c-iBn73dDE?t=5288