Update README.md

README.md

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 # What is this?
 
-Here is a bunch of files which together create a MongoDB Docker container with Docker volume data accessible from the host and a custom Mongo config file.
-
-It's built for remote access to Mongo from a client computer.
+Here is a bunch of files which together create a MongoDB Docker container with db data accessible from the host and a custom Mongo config file.
 
 # Prerequisites and installation
 
+You need Docker. For Ubuntu installation, click [here](https://docs.docker.com/engine/installation/linux/ubuntulinux/).
+
 1. SSH to your instance and execute: `git clone https://github.com/adsalpha/docker-mongo-config/ && cd docker-mongo-config`.
 2. Edit the mongod.conf according to your needs. You can take mine, which opens access to the database from remote computers.
 3. Build the image using `docker build -t <imagename> .`
 4. Create a running container with `docker run -p 27017:27017 --name mongo -it <imagename>`
 
 ##### Why not pull from Docker Hub?
-Your config file may be different from mine. You could've pulled the image, added your config to /var/lib/volumes/.../_data, but it's not that straighforward. However, if you think your image could be useful to someone, you're welcome to commit it.
+Your config file may be different from mine. You could've pulled the image, added your config to `/var/lib/volumes/.../_data`, but it's not that straighforward. However, if you think your image could be useful to someone, you're welcome to commit it.
 
 # Accessing the database
 
-Access your Mongo shell remotely thru `mongo <hostip>:27017` from a client computer or use a programming language driver. To get a bash shell into the container, execute `docker exec -it mongo bash`. To view the server logs, do `docker attach mongo`.
+Access your Mongo shell remotely thru `mongo <hostip>:27017` from a client computer or use a programming language driver. To get a bash shell into the container, execute `docker exec -it mongo bash`. To view server logs, do `docker attach mongo`.
 
 Since your server is accessible from the outside, it'd also be a good idea to configure your server firewall to allow access from certain IP(s). I use UFW on Ubuntu, opening port 27017 for my VPN and 22 for my Mac and VPN.