Create a hosted docker registry on Caprover

registry-caprover.json

{
  "captainVersion": "2",
  "documentation": "Based on https://www.digitalocean.com/community/tutorials/how-to-set-up-a-private-docker-registry-on-ubuntu-18-04",
  "displayName": "Docker Container Registry",
  "dockerCompose": {
    "version": "3.3",
    "services": {
      "$$cap_appname": {
        "image": "registry:2",
        "containerHttpPort": "5000",
        "restart": "always",
        "volumes": [
          "$$cap_appname-data:/data",
          "$$cap_appname-auth:/auth"
        ],
        "environment": {
          "REGISTRY_AUTH": "htpasswd",
          "REGISTRY_AUTH_HTPASSWD_REALM": "Registry",
          "REGISTRY_AUTH_HTPASSWD_PATH": "/auth/registry.password",
          "REGISTRY_STORAGE_FILESYSTEM_ROOTDIRECTORY": "/data"
        }
      }
    }
  },
  "instructions": {
    "start": "",
    "stop": ""
  }
}