diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f32a097..8dd9d7b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,19 +1,30 @@
-name: Scala CI
+name: CI
 
 on:
+  workflow_dispatch:
+    inputs:
+      environment:
+        description: 'Deployment environment (dev|stage|prod)'
+        required: true
+        default: 'dev'
+
   push:
-    branches: [ "main" ]
-  pull_request:
-    branches: [ "main" ]
+    branches:
+      - develop
+      - release
 
 permissions:
   contents: read
 
 env:
+  JAVA_VERSION: 21
+  DOCKER_REGISTRY: ghcr.io
+  DOCKER_IMAGE_NAME: ${{ github.repository }}
   HTRC_NEXUS_DRHTRC_PWD: ${{ secrets.HTRC_NEXUS_DRHTRC_PWD }}
 
 jobs:
-  test:
+  ci:
+    name: Build & test
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
@@ -23,7 +34,7 @@ jobs:
       - name: Set up Java
         uses: actions/setup-java@v4
         with:
-          java-version: '21'
+          java-version: '${{ env.JAVA_VERSION }}'
           distribution: 'temurin'
           cache: 'sbt'
       - name: Run tests with coverage
@@ -33,3 +44,84 @@ jobs:
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           fail_ci_if_error: false
+
+  docker-build:
+    name: Build and push Docker image
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+    needs: ci
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+      - name: Generate Dockerfile
+        run: sbt "Docker/stage"
+      - name: Show GitHub context
+        env:
+          GITHUB_CONTEXT: ${{ toJson(github) }}
+        run: echo "$GITHUB_CONTEXT"
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.DOCKER_REGISTRY }}/${{ env.DOCKER_IMAGE_NAME }}
+          tags: |
+            type=sha,prefix={{branch}}-,priority=750,enable=${{ startsWith(github.ref, 'refs/heads/') }}
+            type=ref,event=branch
+            type=ref,event=pr
+            type=pep440,pattern={{version}}
+            type=pep440,pattern={{major}}.{{minor}}
+            type=raw,value=latest,enable={{is_default_branch}}
+          labels: |
+            org.opencontainers.image.vendor=HathiTrust Research Center
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.DOCKER_REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build and push Docker images
+        uses: docker/build-push-action@v5
+        with:
+          context: target/docker/stage/
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+      - name: Repository Dispatch
+        if: github.event.inputs.environment == ''
+        uses: peter-evans/repository-dispatch@v3
+        env:
+          HEAD_COMMIT_MESSAGE: ${{ toJSON(github.event.head_commit.message) }}
+        with:
+          token: ${{ secrets.PAT }}
+          repository: htrc/torchlite-argocd
+          event-type: argocd
+          client-payload: >-
+            {
+              "image": "${{ fromJSON(steps.meta.outputs.json).tags[0] }}",
+              "commit_msg": "[${{ github.head_ref || github.ref_name }}]: ${{ env.HEAD_COMMIT_MESSAGE }}",
+              "repository": "${{ github.event.repository.name }}",
+              "environment": "${{ github.event.inputs.environment }}",
+              "ref": "${{ github.head_ref || github.ref_name }}"
+            }
+      - name: Manual Repository Dispatch
+        if: github.event.inputs.environment != ''
+        uses: peter-evans/repository-dispatch@v3
+        env:
+          HEAD_COMMIT_MESSAGE: ${{ toJSON(github.event.head_commit.message) }}
+        with:
+          token: ${{ secrets.PAT }}
+          repository: htrc/torchlite-argocd
+          event-type: argocd-manual
+          client-payload: >-
+            {
+              "image": "${{ fromJSON(steps.meta.outputs.json).tags[0] }}",
+              "commit_msg": "[${{ github.head_ref || github.ref_name }}]: Manual deployment by ${{ github.triggering_actor }}",
+              "repository": "${{ github.event.repository.name }}",
+              "environment": "${{ github.event.inputs.environment }}",
+              "ref": "${{ github.head_ref || github.ref_name }}"
+            }