Added dockerhub actions workflow

.github/workflows/dockerhub.yaml

@@ -0,0 +1,27 @@
+name: Dockerhub Build
+
+on:
+  workflow_dispatch:
+    inputs:
+      tag:
+        type: string
+        required: true
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    env:
+      DOCKERHUB_USERNAME: koslib
+    steps:
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ env.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Build and push
+        uses: docker/build-push-action@v3
+        with:
+          push: true
+          tags: koslib/ga-helm-eks:latest, koslib/ga-helm-eks:{{ github.event.inputs.tag }}