Updates README file. (#3)

README.md

@@ -1 +1,45 @@
 # maliput_malidrive
+
+A maliput backend.
+
+## Build
+
+1. Setup a maliput_malidrive (or a wider maliput) development workspace as described [here](https://github.com/ToyotaResearchInstitute/dsim-repos-index/tree/master/README.md)
+
+2. Bring up your development workspace:
+
+```sh
+cd path/to/my/workspace
+source ./bringup
+```
+
+3. Build maliput_malidrive packages and their dependencies:
+
+   ```sh
+   colcon build --packages-up-to maliput_malidrive
+   ```
+
+## Run sample applications
+
+1. Bring up your development workspace:
+
+```sh
+cd path/to/my/workspace
+source ./bringup
+```
+
+2. Source your build:
+
+```sh
+source ./install/setup.bash
+```
+
+And then run one of the sample applications. To fully inspect them, visit the
+`applications` directory.
+
+There are more applications for using `maliput_malidrive` backend.
+See [maliput_integration](https://github.com/ToyotaResearchInstitute/maliput-integration) repository.
+
+## Documentation
+
+See [maliput_documentation](https://github.com/ToyotaResearchInstitute/maliput-documentation) repository for further documentation.