README improved

README.md

@@ -2,43 +2,44 @@
 
 Dockerfile and compose files used as basis for service deployment.
 
-## Build and push an image
+## Prepare environment
 
-Full image name is made up of registry URL and image name.
 ```
-fullImageName = [registryUrl]/[baseImageName]
+registry=[registryUrl]
+image=[imageName]
+tag=[versionTag]
 ```
 
+## Build and push an image
+
 Build the image with *latest* tag.
 ```
-$ docker build -t [fullImageName] [folder]
+docker build -t $registry/$image $image
 ```
 
 Tag the image with version.
 ```
-$ docker tag [fullImageName] [fullImageName]:[tag]
+docker tag $registry/$image $registry/$image:$tag
+```
+
+Test image locally
+```
+docker run --name test $registry/$image:$tag
 ```
 
 Login into docker registry (If it's the first time or you are not saving credentials).
 ```
-$ docker login [registryUrl]
+docker login $registry
 ```
 
 Push the *latest* image and version tag.
 ```
-$ docker push [fullImageName]
+docker push $registry/$image
-$ docker push [fullImageName]:[tag]
+docker push $registry/$image:$tag
 ```
 
 Logout from docker registry (If you don't logout, credentials will remain saved
 in your home directory).
 ```
-$ docker logout [registryUrl]
+docker logout $registry
 ```
-
-## Test image locally
-
-```
-$ docker run -d --name [containerName] [registryUrl]/[imageName]:[tag]
-```
-