chore(ci): added image releasing workflow

.github/workflows/build-image.yml

@@ -0,0 +1,49 @@
+name: Build and Push Fineract Image
+
+on:
+  push:
+    branches:
+      - main   # build whenever you push to main
+  workflow_dispatch:   # allow manual runs from the Actions tab
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout source
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+
+      - name: Cache Gradle
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+          restore-keys: ${{ runner.os }}-gradle-
+
+      - name: Log in to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push Docker image with Jib
+        run: |
+          IMAGE=ghcr.io/${{ github.repository }}/fineract
+
+          echo "Building image with commit SHA tag"
+          ./gradlew :fineract-provider:jib \
+            -Djib.to.image=$IMAGE:${{ github.sha }}
+
+          echo "Also tagging as latest"
+          ./gradlew :fineract-provider:jib \
+            -Djib.to.image=$IMAGE:latest