🤖 feat: simplify CI/CD structure and add Docker workflow

- Rename ci-cd.yaml to go-ci-cd.yaml for clarity
- Add dockerimage.yaml workflow for Docker builds
- Create Dockerfile for production deployment
- Add comprehensive CI/CD documentation
- Create contributor-quickstart.sh for easy validation
- Update all scripts to handle both workflow files
- Fix event triggers to run on all relevant pushes
- Remove redundant YAML syntax validation
- Improve workflow validation for Arcodange conventions

BREAKING CHANGE: ci-cd.yaml renamed to go-ci-cd.yaml
See scripts/cicd/README.md for complete documentation.

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

.gitea/workflows/go-ci-cd.yaml

@@ -0,0 +1,154 @@
+---
+# DanceLessonsCoach CI/CD Pipeline for Arcodange Gitea
+# Follows Arcodange conventions from webapp workflow
+# Uses .gitea/workflows/ directory and internal registry
+
+name: Go CI/CD Pipeline
+
+on:
+  workflow_dispatch: {}
+  push:
+    branches:
+      - main
+      - 'ci/**'
+      - 'feature/**'
+      - 'fix/**'
+      - 'refactor/**'
+    paths-ignore:
+      - 'README.md'
+      - 'doc/**'
+      - 'adr/**'
+      - '.gitea/**'
+  pull_request:
+    branches:
+      - main
+    types: [opened, synchronize, reopened, labeled]
+    paths-ignore:
+      - 'README.md'
+      - 'doc/**'
+      - 'adr/**'
+      - '.gitea/**'
+
+# cancel any previously-started runs of this workflow on the same branch
+concurrency:
+  group: ${{ github.ref }}-${{ github.workflow }}
+  cancel-in-progress: true
+
+# Arcodange-specific environment variables
+env:
+  GITEA_INTERNAL: "https://gitea.arcodange.lab/"
+  GITEA_EXTERNAL: "https://gitea.arcodange.fr/"
+  GITEA_ORG: "arcodange"
+  GITEA_REPO: "DanceLessonsCoach"
+  CI_REGISTRY: "gitea.arcodange.lab"
+
+jobs:
+  build-test:
+    name: Build and Test
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: '1.26.1'
+          cache: true
+
+      - name: Install dependencies
+        run: go mod tidy
+
+      - name: Build all packages
+        run: go build ./...
+
+      - name: Run tests with coverage
+        run: go test ./... -cover -v
+
+      - name: Build binaries
+        run: ./scripts/build.sh
+
+      - name: List artifacts
+        run: ls -la bin/
+
+  lint-format:
+    name: Lint and Format
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: '1.26.1'
+
+      - name: Run go fmt
+        run: go fmt ./...
+
+      - name: Run go vet
+        run: go vet ./...
+
+      - name: Check for formatting issues
+        run: |
+          if [ -n "$(go fmt ./...)" ]; then
+            echo "❌ Formatting issues found"
+            exit 1
+          fi
+          echo "✅ Code is properly formatted"
+
+  workflow-validation:
+    name: Arcodange Workflow Validation
+    runs-on: ubuntu-latest
+    if: github.event_name == 'pull_request' || contains(github.ref, 'ci/')
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Run Arcodange workflow validation
+        run: ./scripts/cicd/validate-workflow.sh
+
+      - name: Check for workflow changes in PR
+        if: github.event_name == 'pull_request'
+        run: |
+          echo "🔍 Checking workflow changes..."
+          changes=$(git diff origin/main -- .gitea/workflows/ | grep -q "^-")
+          if [ $changes ]; then
+            echo "⚠️  Workflow changes detected - review recommended"
+          else
+            echo "✅ No workflow changes"
+          fi
+
+  version-check:
+    name: Version Management
+    runs-on: ubuntu-latest
+    needs: [build-test, lint-format, workflow-validation]
+    if: github.ref == 'refs/heads/main'
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Show current version
+        run: |
+          source VERSION
+          echo "Version: $MAJOR.$MINOR.$PATCH${PRERELEASE:+-$PRERELEASE}"
+          echo "GITEA_REPO=$GITEA_ORG/$GITEA_REPO" >> $GITHUB_ENV
+
+      - name: Check for version bump candidates
+        run: |
+          echo "📋 Last commit analysis:"
+          git log -1 --pretty=%B | head -1
+
+          if git log -1 --pretty=%B | grep -q "^feat:"; then
+            echo "🎯 Feature commit detected - consider MINOR version bump"
+          elif git log -1 --pretty=%B | grep -q "^fix:"; then
+            echo "🐛 Fix commit detected - consider PATCH version bump"
+          elif git log -1 --pretty=%B | grep -q "BREAKING CHANGE"; then
+            echo "💥 Breaking change detected - consider MAJOR version bump"
+          else
+            echo "⏭️  No automatic version bump needed"
+          fi