Add action for building base template #1

	name: Build and push prepared templates

	on:
	push:
	paths:
	- 'sandboxes/**'
	- '.github/workflows/templates.yml'
	branches:
	- main

	permissions:
	contents: read

	jobs:
	buildAndPublish:
	defaults:
	run:
	working-directory: ./templates/base

	name: Build and Push Images
	runs-on: ubuntu-20.04
	steps:
	- name: Checkout repository
	uses: actions/checkout@v3

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3

	- name: Log in to Docker Hub
	uses: docker/login-action
	with:
	username: ${{ secrets.DOCKERHUB_USERNAME }}
	password: ${{ secrets.DOCKERHUB_PASSWORD }}

	- name: Build and push
	uses: docker/build-push-action@v5
	with:
	push: true
	tags: ${{ secrets.DOCKERHUB_USERNAME }}/base:latest

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