Add Dockerfile.

Add a Dockerfile to build Docker images. Also add a documentation file to help
building Docker for this looking glass. The official Docker image uses the PHP
image with Apache 2 and PHP 5.6.

1 files changed, 8 insertions, 1 deletions

diff --git a/README.md b/README.md
index eb59caf..500fcce 100644
--- a/README.md
+++ b/README.md
@@ -37,7 +37,14 @@ future:
 
 Copy the configuration **config.php.example** file to create a **config.php**
 file. It contains all the values (PHP variables) used to customize the looking
-glass.
+glass. Details about configuration options are available in the
+[documentation](docs/configuration.md).
+
+## Docker
+
+If you want to run the looking glass inside a Docker container, a Dockerfile
+is provided in this repository. Some more details can be found
+[here](docs/docker.md).
 
 ## Documentation