Primitive README added.

README.md

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+
+`service` is a tool that deploys and manages dæmons and services.
+
+## Dependencies
+
+You’ll need `crystal` and `make` to build the application, and `shards` to fetch a few Crystal libraries.
+
+Run `shards install` to fetch the Crystal libraries.
+
+## Building
+
+`service` uses a `build.zsh`-generated Makefile.
+You can run `make help` to get a list of all available build targets (“make commands”).
+
+```sh
+make help
+```
+
+To build and install the software with default configuration, run the following:
+
+```sh
+make
+make install
+```
+
+If you want to alter the installation prefix or destination, use the following syntax:
+
+```sh
+make PREFIX=/usr DESTDIR=/some/fake/root install
+```
+
+If `make` complains that the Makefile is missing, you’ll have to generate it with the following command:
+
+```sh
+build.zsh
+```
+
+## Usage
+
+Read `service.1` and `service.7` for more informations about how `service` is meant to be used.
+
+## Quickstart
+
+```sh
+service add postgresql
+service add gitea domain=gitea.test
+
+service start postgresql
+
+service show gitea
+service status -v
+service status -v gitea
+```
+
+