add workflow for pushing docker image

.github/workflows/push-image.yml

@@ -0,0 +1,42 @@
+name: Push Image to ghcr.io
+run-name: ${{ github.actor }} is running this workflow
+on: [push]
+jobs:
+  Pull-From_Gitlab:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Login to GitLab
+        uses: docker/login-action@v3
+        with:
+          registry: registry.gitlab.com
+          username: ${{ secrets.GITLAB_USERNAME }}
+          password: ${{ secrets.GITLAB_PASSWORD }}
+      -
+        - name: Pull Gitlab Image
+        - run: docker pull registry.gitlab.com/f5/greenhouse/apps/seven-layer-cake-collector/custom_otel_coleector:latest
+      -
+        name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      -
+        - name: Push to Github
+        - run: docker tag registry.gitlab.com/f5/greenhouse/apps/seven-layer-cake-collector/custom_otel_coleector:latest ghcr.io/f5devcentral/application-study-tool/custom_otel_collector:latest
+        - run: docker push ghcr.io/f5devcentral/application-study-tool/custom_otel_collector:latest
+
+  Explore-GitHub-Actions:
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo "🎉 The job was automatically triggered by a ${{ github.event_name }} event."
+      - run: echo "🔎 The name of your branch is ${{ github.ref }} and your repository is ${{ github.repository }}."
+      - name: Check out repository code
+        uses: actions/checkout@v4
+      - run: echo "💡 The ${{ github.repository }} repository has been cloned to the runner."
+      - run: echo "🖥️ The workflow is now ready to test your code on the runner."
+      - name: List files in the repository
+        run: |
+          ls ${{ github.workspace }}
+      - run: echo "🍏 This job's status is ${{ job.status }}."