Add Docker build workflow

.github/workflows/docker-build-mcp-sse-server.yml

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+# Docker Build for MCP SSE Server - Build and push image to GitHub Container Registry
+#
+# This workflow validates Docker builds for container-related changes and
+# publishes release/manual images to GitHub Container Registry (ghcr.io).
+#
+# Required secrets:
+# - GITHUB_TOKEN (auto-provided): Used to authenticate with GHCR
+
+name: Docker Build (MCP SSE Server)
+
+on:
+    push:
+        branches: [main]
+        tags: ["v*"]
+        paths:
+            - "mcp-sse-server/Dockerfile"
+            - "mcp-sse-server/package.json"
+            - "mcp-sse-server/package-lock.json"
+            - ".github/workflows/docker-build-mcp-sse-server.yml"
+    pull_request:
+        branches: [main]
+        paths:
+            - "mcp-sse-server/Dockerfile"
+            - "mcp-sse-server/package.json"
+            - "mcp-sse-server/package-lock.json"
+            - ".github/workflows/docker-build-mcp-sse-server.yml"
+    workflow_dispatch:
+        inputs:
+            tag:
+                description: "Custom tag for the image (optional)"
+                required: false
+                default: ""
+
+env:
+    REGISTRY: ghcr.io
+    IMAGE_NAME: ${{ github.repository }}/mcp-sse-server
+
+jobs:
+    build:
+        runs-on: ubuntu-latest
+        permissions:
+            contents: read
+            packages: write
+            attestations: write
+            id-token: write
+
+        steps:
+            - name: Checkout repository
+              uses: actions/checkout@v4
+
+            - name: Set up Docker Buildx
+              uses: docker/setup-buildx-action@v3
+
+            - name: Log in to Container Registry
+              if: startsWith(github.ref, 'refs/tags/v') || github.event_name == 'workflow_dispatch'
+              uses: docker/login-action@v3
+              with:
+                  registry: ${{ env.REGISTRY }}
+                  username: ${{ github.actor }}
+                  password: ${{ secrets.GITHUB_TOKEN }}
+
+            - name: Extract metadata
+              id: meta
+              uses: docker/metadata-action@v5
+              with:
+                  images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+                  tags: |
+                      type=ref,event=branch
+                      type=ref,event=pr
+                      type=semver,pattern={{version}}
+                      type=semver,pattern={{major}}.{{minor}}
+                      type=semver,pattern={{major}}
+                      type=sha,prefix=sha-,suffix=,format=short
+                      type=raw,value=latest,enable={{is_default_branch}}
+                      type=raw,value=${{ inputs.tag }},enable=${{ inputs.tag != '' }}
+
+            - name: Build and optionally push Docker image
+              id: push
+              uses: docker/build-push-action@v6
+              with:
+                  context: ./mcp-sse-server
+                  push: ${{ startsWith(github.ref, 'refs/tags/v') || github.event_name == 'workflow_dispatch' }}
+                  tags: ${{ steps.meta.outputs.tags }}
+                  labels: ${{ steps.meta.outputs.labels }}
+                  cache-from: type=gha
+                  cache-to: type=gha,mode=max
+                  platforms: ${{ (startsWith(github.ref, 'refs/tags/v') || github.event_name == 'workflow_dispatch') && 'linux/amd64,linux/arm64' || 'linux/amd64' }}
+
+            - name: Generate artifact attestation
+              if: startsWith(github.ref, 'refs/tags/v') || github.event_name == 'workflow_dispatch'
+              uses: actions/attest-build-provenance@v2
+              with:
+                  subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+                  subject-digest: ${{ steps.push.outputs.digest }}
+                  push-to-registry: true
+
+            - name: Print image digest
+              if: startsWith(github.ref, 'refs/tags/v') || github.event_name == 'workflow_dispatch'
+              run: |
+                  echo "MCP SSE Server image pushed successfully!"
+                  echo "Digest: ${{ steps.push.outputs.digest }}"
+                  echo "Tags:"
+                  echo "${{ steps.meta.outputs.tags }}"

.github/workflows/docker-build.yml

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+# Docker Build - Build and push image to GitHub Container Registry
+#
+# This workflow validates Docker builds for container-related changes and
+# publishes release/manual images to GitHub Container Registry (ghcr.io).
+#
+# Usage:
+# - Release images are tagged from git refs/semver metadata
+# - Access packages at: https://github.com/OWNER/REPOSITORY/pkgs/container/REPO_NAME
+#
+# Required secrets:
+# - GITHUB_TOKEN (auto-provided): Used to authenticate with GHCR
+
+name: Docker Build
+
+on:
+    push:
+        branches: [main]
+        tags: ["v*"]
+        paths:
+            - Dockerfile
+            - requirements.txt
+            - ".github/workflows/docker-build.yml"
+    pull_request:
+        branches: [main]
+        paths:
+            - Dockerfile
+            - requirements.txt
+            - ".github/workflows/docker-build.yml"
+    workflow_dispatch:
+        inputs:
+            tag:
+                description: "Custom tag for the image (optional)"
+                required: false
+                default: ""
+
+env:
+    REGISTRY: ghcr.io
+    IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+    build:
+        runs-on: ubuntu-latest
+        permissions:
+            contents: read
+            packages: write
+            attestations: write
+            id-token: write
+
+        steps:
+            - name: Checkout repository
+              uses: actions/checkout@v4
+
+            - name: Set up Docker Buildx
+              uses: docker/setup-buildx-action@v3
+
+            - name: Log in to Container Registry
+              if: startsWith(github.ref, 'refs/tags/v') || github.event_name == 'workflow_dispatch'
+              uses: docker/login-action@v3
+              with:
+                  registry: ${{ env.REGISTRY }}
+                  username: ${{ github.actor }}
+                  password: ${{ secrets.GITHUB_TOKEN }}
+
+            - name: Extract metadata
+              id: meta
+              uses: docker/metadata-action@v5
+              with:
+                  images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+                  tags: |
+                      type=ref,event=branch
+                      type=ref,event=pr
+                      type=semver,pattern={{version}}
+                      type=semver,pattern={{major}}.{{minor}}
+                      type=semver,pattern={{major}}
+                      type=sha,prefix=sha-,suffix=,format=short
+                      type=raw,value=latest,enable={{is_default_branch}}
+                      type=raw,value=${{ inputs.tag }},enable=${{ inputs.tag != '' }}
+
+            - name: Build and optionally push Docker image
+              id: push
+              uses: docker/build-push-action@v6
+              with:
+                  context: .
+                  push: ${{ startsWith(github.ref, 'refs/tags/v') || github.event_name == 'workflow_dispatch' }}
+                  tags: ${{ steps.meta.outputs.tags }}
+                  labels: ${{ steps.meta.outputs.labels }}
+                  cache-from: type=gha
+                  cache-to: type=gha,mode=max
+                  platforms: ${{ (startsWith(github.ref, 'refs/tags/v') || github.event_name == 'workflow_dispatch') && 'linux/amd64,linux/arm64' || 'linux/amd64' }}
+
+            - name: Generate artifact attestation
+              if: startsWith(github.ref, 'refs/tags/v') || github.event_name == 'workflow_dispatch'
+              uses: actions/attest-build-provenance@v2
+              with:
+                  subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+                  subject-digest: ${{ steps.push.outputs.digest }}
+                  push-to-registry: true
+
+            - name: Print image digest
+              if: startsWith(github.ref, 'refs/tags/v') || github.event_name == 'workflow_dispatch'
+              run: |
+                  echo "Image pushed successfully!"
+                  echo "Digest: ${{ steps.push.outputs.digest }}"
+                  echo "Tags:"
+                  echo "${{ steps.meta.outputs.tags }}"