chore: update README.md

README.md

@@ -10,6 +10,7 @@ Update the following variables in the `Makefile`:
 * `APP_VERSION`
 * `APP_AUTHOR`
 * `APP_REPOSITORY`
+* `DOCKER_REGISTRY`
 * `DOCKER_REPOSITORY`
 
 Good 🤓? Now run:
@@ -18,7 +19,7 @@ Good 🤓? Now run:
 make it
 ```
 
-This command builds both your Gotenberg's Docker image variant (`$(DOCKER_REPOSITORY)/gotenberg:$(GOTENBERG_VERSION)-$(APP_NAME)-$(APP_VERSION)`)
+This command builds both your Gotenberg's Docker image variant (`$(DOCKER_REGISTRY)/$(DOCKER_REPOSITORY):$(GOTENBERG_VERSION)-$(APP_NAME)-$(APP_VERSION)`)
 and a tests' Docker image.
 
 ## Next steps
@@ -51,7 +52,7 @@ gotodos  Display TODOs in your Go source
 The Gotenberg's image has a `version` label which contains the underlying Gotenberg's version:
 
 ```
-docker inspect $(DOCKER_REPOSITORY)/gotenberg:$(GOTENBERG_VERSION)-$(APP_NAME)-$(APP_VERSION)
+docker inspect $(DOCKER_REGISTRY)/$(DOCKER_REPOSITORY):$(GOTENBERG_VERSION)-$(APP_NAME)-$(APP_VERSION)
 ```
 
 ---