add automated image building

Author: ocReaper

.github/workflows/publish.yml

@@ -0,0 +1,36 @@
+name: Build and publish images
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        include:
+          - tag: "8.2"
+            php: "8.2"
+          - tag: "8.1"
+            php: "8.1"
+          - tag: "8.0"
+            php: "8.0"
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          push: true
+          context: ${{ matrix.php }}
+          tags: ocreaper/php-nvm:${{ matrix.tag }}