add tag input

Signed-off-by: Luca Stocchi <lstocchi@redhat.com>

README.md

@@ -27,6 +27,12 @@ Note that GitHub's [Ubuntu Environments](https://github.com/actions/virtual-envi
     <td>Name to give to the image that will be eventually created.</td>
   </tr>
 
+  <tr>
+    <td>tag</td>
+    <td>No</td>
+    <td>Tag to give to the image that will be eventually created (default: latest)</td>
+  </tr>
+
   <tr>
     <td>base-name</td>
     <td>No</td>

action.yml

@@ -8,6 +8,10 @@ inputs:
   image:
     description: 'The name (reference) of the image to build'
     required: true
+  tag:
+    description: 'The tag of the image to build'
+    required: false
+    default: latest
   base-image:
     description: 'The base image to use to create a new container image'
     required: false

src/index.ts

@@ -18,7 +18,7 @@ export async function run(): Promise<void> {
 
     const workspace = process.env['GITHUB_WORKSPACE'];
     let dockerFiles = getInputList('dockerfiles');
-    const newImage = core.getInput('image');
+    const newImage = `${core.getInput('image')}:${core.getInput('tag')}`;
     
     if (dockerFiles.length !== 0) {
         doBuildUsingDockerFiles(cli, newImage, workspace, dockerFiles);