Add taskfile and dev dockerfile

.dockerignore

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+vendor
+.git

dev.dockerfile

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+FROM php:8.1 AS php
+RUN apt update && apt install -y unzip zip wget
+WORKDIR /root
+# Install composer
+RUN wget https://raw.githubusercontent.com/composer/getcomposer.org/cd8ca011326ab9a17a555846c69461c1d53c1895/web/installer -O - -q | php -- --quiet
+
+FROM php AS prod_dependencies
+# Install only production dependencies
+WORKDIR /src
+ADD composer.json /src/
+ADD composer.lock /src/
+RUN /root/composer.phar install --no-dev
+ADD . /src
+
+FROM php AS dev_dependencies
+# Install all dependencies (including dev)
+WORKDIR /src
+ADD composer.json /src/
+ADD composer.lock /src/
+RUN /root/composer.phar install
+ADD . /src
+
+FROM dev_dependencies AS test
+RUN /src/vendor/bin/phpunit --process-isolation tests
+
+FROM dev_dependencies AS lint
+WORKDIR /src
+RUN /src/vendor/bin/phpcs --config-set installed_paths ../../phpcsstandards/phpcsextra,../../phpcsstandards/phpcsutils,../../wp-coding-standards/wpcs
+RUN /src/vendor/bin/phpcs -ps --standard=WordPress class-duouniversal-*.php
+
+FROM prod_dependencies AS package
+WORKDIR /src
+RUN ./package.sh

taskfile.yml

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+# Run using https://taskfile.dev/
+# Or manually copy/paste these commands as needed.
+version: '3'
+
+tasks:
+  run:
+      - docker-compose up -d
+      - cmd: echo "Visit localhost/wp-login.php in a browser to continue setup"
+        silent: true
+      - cmd: echo "Run 'task stop' to stop"
+        silent: true
+  stop:
+      - docker-compose stop
+  test:
+      - docker build -f dev.dockerfile -t duo_wordpress --target test .
+  lint:
+      - docker build -f dev.dockerfile -t duo_wordpress --target lint .
+  package:
+      - docker build -f dev.dockerfile -t duo_wordpress --target package .
+      - docker run --rm duo_wordpress cat /src/duo-universal.zip > duo-universal.zip