Add PHP-FPM documentation

bitnami/memcached/README.md

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+# Bitnami Memcached Docker Container
+
+## Introduction to Bitnami containers
+Bitnami provides easy-to-use, consistently configured, and always up-to-date container images. [Click here](https://bitnami.com) for more information on our packaging approach.
+
+## What is Memcached?
+Memcached is an in-memory key-value store for small chunks of arbitrary data (strings, objects) from results of database calls, API calls, or page rendering.
+
+## Usage
+You can instantiate a Bitnami Memcached container by doing:
+
+```
+CONTAINER_MEMCACHED_SERVER_NAME=memcached
+docker run -it \
+  --name $CONTAINER_MEMCACHED_SERVER_NAME
+  bitnami/memcached
+```
+
+### Environment variables
+
+You can specify the `MEMCACHED_PASSWORD` to specify a password for your memcached server.
+
+## Linking
+
+You can link the Memcached to a container running your application, e.g., using the Bitnami node container:
+
+```
+CONTAINER_MEMCACHED_LINK_NAME=memcached
+docker run --rm -it \
+    --link $CONTAINER_MEMCACHED_SERVER_NAME:$CONTAINER_MEMCACHED_LINK_NAME bitnami/node \
+    npm start --production
+```
+Inside your application, use the value of $CONTAINER_MEMCACHED_LINK_NAME when setting the Memcached host.
+
+## Logging
+
+The container is set up to log to stdout, which means logs can be obtained as follows:
+
+```
+docker logs memcached
+```
+
+If you would like to log to a file instead, you can mount a volume at `/logs`.