Add build script

.github/workflows/build.yml

@@ -0,0 +1,34 @@
+name: Build and Publish Docker Container
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    container:
+      image: catthehacker/ubuntu:act-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Login to Docker
+        uses: docker/login-action@v1
+        with:
+          registry: git.joshuacoles.me
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Build and Push Docker image
+        uses: docker/build-push-action@675965c0e16f1a0f94ecafff969d8c966f92c17b
+        with:
+          context: .
+          push: true
+          tags: git.joshuacoles.me/personal/lecture-attendance-manager:latest
+          build-args: APP_NAME=finn-board