Add feature to pass extra args when pushing image

If a user wants to pass few extra args to push
command when pushing image, then he can pass
using 'extra-args' input parameter.

Signed-off-by: divyansh42 <diagrawa@redhat.com>

README.md

@@ -68,7 +68,15 @@ Refer to the [`podman push`](http://docs.podman.io/en/latest/markdown/podman-man
     <td>digestfile</td>
     <td>No</td>
     <td>After copying the image, write the digest of the resulting image to the file. By default, the filename will be determined from the image and tag.
-    The contents of this file are the <code>digest</code> output.
+    The contents of this file are the <code>digest</code> output.</td>
+  </tr>
+
+  <tr>
+    <td>extra-args</td>
+    <td>No</td>
+    <td>Extra args to be passed to push command when pushing image.</td>
+  </tr>
+
 </table>
 
 ## Action Outputs

action.yml

@@ -31,6 +31,9 @@ inputs:
       By default, the filename will be determined from the image and tag.
       The contents of this file are the digest output.
     required: false
+  extra-args:
+    description: 'Extra args to be passed to push command when pushing image'
+    required: false
   
 outputs:
   digest:

src/index.ts

@@ -43,6 +43,7 @@ async function run(): Promise<void> {
     const password = core.getInput("password", { required: true });
     const tlsVerify = core.getInput("tls-verify");
     const digestFileInput = core.getInput("digestfile");
+    const extraArgs = core.getInput("extra-args");
 
     imageToPush = `${imageInput}`;
     const registryPathList: string[] = [];
@@ -159,6 +160,10 @@ async function run(): Promise<void> {
             registryPath,
         ];
 
+        if (extraArgs) {
+            args.push(extraArgs);
+        }
+
         // check if tls-verify is not set to null
         if (tlsVerify) {
             args.push(`--tls-verify=${tlsVerify}`);