A test app that uses the Authorization Code Flow (Standard Flow in Keycloak terms) It:

• sets up a simple http server
• requests a code from the keycloak server
• exchanges the code for an access token
• prints the access token
• decodes the access token

Before running update the Dockerfile with your configuration

• PORT: The port on which your app server will be running/listening to for requests
• BASE_URL: The KeyCloak server url (i.e. https://keycloak)
• CLIENT_ID: The client id of the client in KeyCloak
• REALM_NAME: The name of the KeyCloak realm where the client exists
• APP_URL: The URL that is used to access the current app (needed for a redirect URL in the token request). Note that it should be the same as the root URL configured in the KeyCloak client

How to run:

Build the image (go to the directory where the dockerfile is located):
sudo docker build -t IMAGE-NAME .

Create and run container:
sudo docker run -it --rm -p PORT:PORT --name CONTAINER-NAME IMAGE-NAME

• If the KeyCloak server is accessed by a hostname then either configure DNS or simply add the --add-host HOSTNAME:IP option to add one in the container
• If you want to start the container in the background replace -it with -d