title: Installing XDebug in Docker
body: <p>I'm trying to install the XDebug in a Docker container, but I'm getting the following error:</p>
  <pre><code>E: Unable to locate package php-xdebug
  </code></pre>
  <p>This is my Dockerfile:</p>
  <pre><code>FROM php:7.0-apache
  
  RUN a2enmod rewrite
  
  RUN docker-php-ext-install pdo pdo_mysql
  
  RUN apt-get install php-xdebug -y
  
  COPY php.ini /usr/local/etc/php/
  COPY . /var/www/html/
  </code></pre>
  <p>When I'm running the same command in my computer, the XDebug is getting installed without any error:</p>
  <pre><code>apt-get install php-xdebug
  </code></pre>
  <p>Where might the problem be?</p>