feat: add Docker deployment and Gitea Actions CI/CD

Add multi-stage Dockerfile, docker-compose with persistent volumes,
and Gitea Actions workflows for CI (lint/test/build) and releases
(tag, Docker image push, changelog). Support DATABASE_PATH env var
for configurable SQLite location to enable proper volume mounting.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/release.yml

@@ -0,0 +1,108 @@
+name: Release
+
+on:
+  workflow_dispatch:
+    inputs:
+      bump:
+        description: "Version bump type"
+        required: true
+        default: "patch"
+        type: choice
+        options:
+          - patch
+          - minor
+          - major
+
+jobs:
+  ci:
+    runs-on: docker
+    container:
+      image: oven/bun:1
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: bun install --frozen-lockfile
+
+      - name: Lint
+        run: bun run lint
+
+      - name: Test
+        run: bun test
+
+      - name: Build
+        run: bun run build
+
+  release:
+    needs: ci
+    runs-on: dind
+    steps:
+      - name: Clone repository
+        run: |
+          apk add --no-cache git curl jq
+          git clone https://${{ secrets.GITEA_TOKEN }}@gitea.jeanlucmakiola.de/${{ gitea.repository }}.git repo
+          cd repo
+          git checkout ${{ gitea.ref_name }}
+
+      - name: Compute version
+        working-directory: repo
+        run: |
+          LATEST_TAG=$(git tag -l 'v*' --sort=-v:refname | head -n1)
+          if [ -z "$LATEST_TAG" ]; then
+            LATEST_TAG="v0.0.0"
+          fi
+          MAJOR=$(echo "$LATEST_TAG" | sed 's/v//' | cut -d. -f1)
+          MINOR=$(echo "$LATEST_TAG" | sed 's/v//' | cut -d. -f2)
+          PATCH=$(echo "$LATEST_TAG" | sed 's/v//' | cut -d. -f3)
+          case "${{ gitea.event.inputs.bump }}" in
+            major) MAJOR=$((MAJOR+1)); MINOR=0; PATCH=0 ;;
+            minor) MINOR=$((MINOR+1)); PATCH=0 ;;
+            patch) PATCH=$((PATCH+1)) ;;
+          esac
+          NEW_VERSION="v${MAJOR}.${MINOR}.${PATCH}"
+          echo "VERSION=$NEW_VERSION" >> "$GITHUB_ENV"
+          echo "PREV_TAG=$LATEST_TAG" >> "$GITHUB_ENV"
+          echo "New version: $NEW_VERSION"
+
+      - name: Generate changelog
+        working-directory: repo
+        run: |
+          if [ "$PREV_TAG" = "v0.0.0" ]; then
+            CHANGELOG=$(git log --pretty=format:"- %s" HEAD)
+          else
+            CHANGELOG=$(git log --pretty=format:"- %s" "${PREV_TAG}..HEAD")
+          fi
+          echo "CHANGELOG<<CHANGELOG_EOF" >> "$GITHUB_ENV"
+          echo "$CHANGELOG" >> "$GITHUB_ENV"
+          echo "CHANGELOG_EOF" >> "$GITHUB_ENV"
+
+      - name: Create and push tag
+        working-directory: repo
+        run: |
+          git config user.name "Gitea Actions"
+          git config user.email "actions@gitea.jeanlucmakiola.de"
+          git tag -a "$VERSION" -m "Release $VERSION"
+          git push origin "$VERSION"
+
+      - name: Build and push Docker image
+        working-directory: repo
+        run: |
+          REGISTRY="gitea.jeanlucmakiola.de"
+          IMAGE="${REGISTRY}/${{ gitea.repository_owner }}/gearbox"
+          docker build -t "${IMAGE}:${VERSION}" -t "${IMAGE}:latest" .
+          echo "${{ secrets.REGISTRY_TOKEN }}" | docker login "$REGISTRY" -u "${{ gitea.repository_owner }}" --password-stdin
+          docker push "${IMAGE}:${VERSION}"
+          docker push "${IMAGE}:latest"
+
+      - name: Create Gitea release
+        run: |
+          API_URL="${GITHUB_SERVER_URL}/api/v1/repos/${{ gitea.repository }}/releases"
+          curl -s -X POST "$API_URL" \
+            -H "Authorization: token ${{ secrets.GITEA_TOKEN }}" \
+            -H "Content-Type: application/json" \
+            -d "$(jq -n \
+              --arg tag "$VERSION" \
+              --arg name "$VERSION" \
+              --arg body "$CHANGELOG" \
+              '{tag_name: $tag, name: $name, body: $body, draft: false, prerelease: false}')"