add build pipeline

.github/actions/build_mint/action.yml

@@ -0,0 +1,37 @@
+name: Build mint container
+description: "Build and upload the mint container used during s3proxy e2e tests."
+
+inputs:
+  version:
+    description: "Version to use for the new mint image"
+    required: true
+  username:
+    description: "Username to use for logging in to the container registry"
+    required: true
+  password:
+    description: "Password to use for logging in to the container registry"
+    required: true
+
+outputs:
+  mintImage:
+    description: "Name and tag of the image that was built and pushed"
+    value: ghcr.io/edgelesssys/constellation/mint:${{ inputs.version }}
+
+runs:
+  using: "composite"
+  steps:
+    - name: Log in to the Container registry
+      uses: ./.github/actions/container_registry_login
+      with:
+        registry: ghcr.io
+        username: ${{ inputs.username }}
+        password: ${{ inputs.password }}
+
+    - name: Build and push container image
+      uses: docker/build-push-action@2eb1c1961a95fc15694676618e422e8ba1d63825 # v4.1.1
+      with:
+        context: ./s3proxy/e2e/mint
+        file: ./s3proxy/e2e/mint/Dockerfile
+        push: true
+        tags: |
+          ghcr.io/edgelesssys/constellation/mint:${{ inputs.version }}

.github/workflows/build-image.yml

@@ -0,0 +1,40 @@
+name: E2E Test s3proxy
+
+on:
+  workflow_dispatch:
+  push:
+    tags:
+      - 'v*.*.*'
+
+
+jobs:
+  build:
+    name: Build docker image
+    runs-on: ubuntu-22.04
+    permissions:
+      id-token: write
+      checks: write
+      contents: read
+      packages: write
+    steps:
+      - name: Checkout
+        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
+
+      - name: Set env
+        id: set-version
+        run: echo "release_version=${GITHUB_REF#refs/*/}" | tee -a $GITHUB_OUTPUT
+
+      - name: Log in to the Container registry
+        uses: ./.github/actions/container_registry_login
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build mint
+        id: mintbuild
+        uses: ./.github/actions/build_mint
+        with:
+          version: ${{ steps.set-version.outputs.release_version }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}