add Dockerfile

Dockerfile

@@ -0,0 +1,26 @@
+FROM php:7-cli
+
+RUN apt-get update \
+    && apt-get install -y git libmagickwand-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN pecl install imagick \
+    && docker-php-ext-enable imagick
+
+RUN curl -sS https://getcomposer.org/installer | php -- \
+    --install-dir=/usr/local/bin --filename=composer \
+    && chmod +x /usr/local/bin/composer
+
+WORKDIR /app
+
+ADD . .
+
+RUN groupadd -r escpos && useradd escpos -m -r -g escpos \
+    && chown -R escpos:escpos /home/escpos \
+    && chown -R escpos:escpos /app
+
+USER escpos
+
+RUN composer install
+
+CMD php esc2text.php ./receipt-with-logo.bin

README.md

@@ -44,6 +44,13 @@ composer install
 
 - [escimages documentation](doc/escimages.md)
 
+## Run with Docker
+
+```bash
+docker build . -t escpos-tools
+docker run -v $PWD:/data escpos-tools /bin/bash -c "php esc2html.php /data/receipt-with-logo.bin > /data/output.html"
+```
+
 ## Contribute
 
 - [CONTRIBUTING.md](CONTRIBUTING.md)