Installation docs.

Summary: Basic How to installation document.

Reviewers: teon.banek, florijan

Reviewed By: teon.banek

Subscribers: pullbot, buda

Differential Revision: https://phabricator.memgraph.io/D445

docs/user_technical/installation.md

@@ -1,8 +1,66 @@
 ## Installation
 
-Run command:
+Memgraph is a 64-bit Linux compatible database management system.
+For the purpose of Alpha testing Memgraph has been packed into
+Ubuntu 16.04 based [Docker](https://www.docker.com) image.
+Before proceeding with the installation, please install
+the Docker engine on your system.
+Instructions how to install Docker can be found
+[here](https://docs.docker.com/engine/installation).
+Memgraph Docker image was built with Docker version `1.12`,
+so all Docker versions since version `1.12` should work.
+
+### Import
+
+After a successful download, Memgraph can be imported as follows
 ```
-docker run -p 7687:7687 memgraph
+docker load -i /path/to/<memgraph_docker_image_name>.tar.gz
 ```
 
-Proceed to [Quick Start](quick-start.md).
+### Run
+
+The most convenient way to start Memgraph is
+```
+docker run -d -p 7687:7687 --name <memgraph_docker_container_name> <memgraph_docker_image_name>
+```
+`-d` means that the container will be detached (run in the background mode).
+Because the default Bolt protocol port is `7687`, the straightforward option
+is to run Memgraph on that port.
+
+### Configuration Parameters
+
+Memgraph can be run with various parameters. The parameters should be
+appended at the end of `docker run` command in the following format
+`--param-name=param-value`.
+Below is a list of all available parameters
+
+ Name  | Type | Default | Description
+-------|------|:-------:|-------------
+ port | integer | 7687 | Communication port on which to listen.
+ num_workers | integer | 8 |  Number of workers (concurrent threads).
+ snapshot_cycle_sec | integer | 300 | Interval, `in seconds`, between two database snapshots. Value of -1 turns the snapshots off. 
+ max_retained_snapshots | integer | 3 | Number of retained snapshots, -1 means without limit.
+ snapshot_on_db_destruction | bool | false | Make a snapshot when closing Memgraph.
+ recover_on_startup | bool | false | Recover the database on startup.
+
+To find more about how to execute queries against
+the database please proceed to [Quick Start](quick-start.md).
+
+### Cleanup
+
+Status & Memgraph's logging messages can be checked with:
+```
+docker ps -a
+docker logs -f <memgraph_docker_container_name>
+```
+
+To stop Memgraph, execute
+```
+docker stop <memgraph_docker_container_name>
+```
+
+After the container has been stopped, it can be removed by
+executing
+```
+docker rm <memgraph_docker_container_name>
+```