Added auto building of releases on GitHub

.github/workflows/main.yml

@@ -0,0 +1,90 @@
+name: Build project and create GitHub Release
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0  # Fetch all history for all tags and branches
+
+      - name: Set up JDK 16
+        uses: actions/setup-java@v2
+        with:
+          distribution: adopt
+          java-version: 16
+
+      - name: Set up Maven
+        uses: stCarolas/setup-maven@v4.2
+        with:
+          maven-version: 3.8.1
+
+      - name: Get version from pom.xml
+        id: version
+        run: echo "VERSION=$(mvn help:evaluate -Dexpression=project.version -q -DforceStdout)" >> $GITHUB_ENV
+
+      - name: Check if tag exists
+        id: tag_exists
+        run: |
+          if git rev-parse "v${{ env.VERSION }}" >/dev/null 2>&1; then
+            echo "TAG_EXISTS=true" >> $GITHUB_ENV
+          else
+            echo "TAG_EXISTS=false" >> $GITHUB_ENV
+          fi
+
+      - name: Exit if tag exists
+        if: env.TAG_EXISTS == 'true'
+        run: echo "Tag v${{ env.VERSION }} already exists. Skipping build and release."
+
+      - name: Fetch commit messages
+        if: env.TAG_EXISTS == 'false'
+        id: fetch_commits
+        run: |
+          git fetch --tags
+          LAST_TAG=$(git describe --tags --abbrev=0 $(git rev-list --tags --max-count=1))
+          COMMIT_MESSAGES=$(git log $LAST_TAG..HEAD --pretty=format:"- %s")
+          echo "COMMIT_MESSAGES<<EOF" >> $GITHUB_ENV
+          echo "Full Changelog:" >> $GITHUB_ENV
+          echo "" >> $GITHUB_ENV
+          echo "$COMMIT_MESSAGES" >> $GITHUB_ENV
+          echo "EOF" >> $GITHUB_ENV
+
+      - name: Build project
+        if: env.TAG_EXISTS == 'false'
+        run: mvn package -B
+
+      - name: List files in target directory
+        if: env.TAG_EXISTS == 'false'
+        run: ls -al ./target/
+
+      - name: Create Release
+        if: env.TAG_EXISTS == 'false'
+        id: create_release
+        uses: actions/create-release@v1
+        with:
+          tag_name: v${{ env.VERSION }}
+          release_name: Release ${{ env.VERSION }}
+          body: ${{ env.COMMIT_MESSAGES }}
+          draft: false
+          prerelease: false
+        env:
+          GITHUB_TOKEN: ${{ secrets.GH_TOKEN }}
+
+      - name: Upload Release Asset
+        if: env.TAG_EXISTS == 'false'
+        uses: actions/upload-release-asset@v1
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: ./target/CustomDrops-${{ env.VERSION }}.jar
+          asset_name: CustomDrops-${{ env.VERSION }}.jar
+          asset_content_type: application/java-archive
+        env:
+          GITHUB_TOKEN: ${{ secrets.GH_TOKEN }}