feat: add automated release workflow

.github/workflows/docker-build.yml

@@ -4,6 +4,8 @@ on:
   push:
     branches: [main]
     tags: ['v*']
+  pull_request:
+    branches: [main]
   workflow_dispatch:
     inputs:
       tag:

.github/workflows/release.yml

@@ -0,0 +1,42 @@
+name: Create Release
+
+on:
+  push:
+    tags: ['v*']
+
+permissions:
+  contents: write
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Generate changelog
+        id: changelog
+        run: |
+          # Get previous tag
+          PREV_TAG=$(git describe --tags --abbrev=0 HEAD^ 2>/dev/null || echo "")
+          
+          if [ -z "$PREV_TAG" ]; then
+            # First release - get all commits
+            CHANGES=$(git log --pretty=format:"- %s" HEAD)
+          else
+            # Get commits since last tag
+            CHANGES=$(git log --pretty=format:"- %s" ${PREV_TAG}..HEAD)
+          fi
+          
+          # Write to file for multiline support
+          echo "$CHANGES" > changelog.txt
+
+      - name: Create Release
+        uses: softprops/action-gh-release@v1
+        with:
+          body_path: changelog.txt
+          generate_release_notes: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}