ci: container image deployment integrated to all relevant stages of t…

…he pipeline

* `integration:deployment` - deploys to testenet
* `integration:prerelease` - deploys to GitLab container registry as `testnet`
* `release:deployment:branch` - deploys to mainnet
* `release:deployment:tag` - deploys to mainnet
* `release:distribution` - deploys to GitLab container registry as `mainnet`

.env.example

@@ -10,30 +10,13 @@ NODE_ENV=development
 # Path to PK executable to override tests/bin target
 # PK_TEST_COMMAND=
 
-# If set, indicates that `PK_TEST_COMMAND` is targetting docker
-# PK_TEST_COMMAND_DOCKER=
-# Login credentials for GitLab's container registry
-# Automatically injected from CI/CD
-CI_REGISTRY_IMAGE=registry.gitlab.com/matrixai/open-source/js-polykey
-CI_REGISTRY_USER=
-CI_REGISTRY_PASSWORD=
-
 # If set, indicates that `PK_TEST_COMMAND` is targetting docker
 # PK_TEST_COMMAND_DOCKER=
 # Accessing AWS for testnet.polykey.io and mainnet.polykey.io deployment
 AWS_DEFAULT_REGION='ap-southeast-2'
 AWS_ACCESS_KEY_ID=
 AWS_SECRET_ACCESS_KEY=
 
-# Container registry domain
-PK_AWS_ECS_REGISTRY='015248367786.dkr.ecr.ap-southeast-2.amazonaws.com'
-# Container repository
-PK_AWS_ECS_IMAGE="$PK_AWS_ECS_REGISTRY/polykey"
-# ECS cluster name
-PK_AWS_ECS_CLUSTER='polykey-testnet'
-# ECS service name
-PK_AWS_ECS_SERVICE='polykey-testnet'
-
 # Path to container registry authentication file used by `skopeo`
 # The file has the same contents as `DOCKER_AUTH_CONFIG`
 # Use this command to acquire the auth file at `./tmp/auth.json`: