add README

Author: StevenKGER

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+# defintly - An app to help you define concepts well.
+
+![Defintly logo](.assets/logo.png)
+
+This is the backend application for **defintly**, re-developed as part of a study assignment for the Berlin School of Economics and Law (Hochschule für Wirtschaft und Recht Berlin).
+
+General command line interface overview:
+````
+Flags:
+  -h, --help                             Show context-sensitive help.
+      --database-hostname="127.0.0.1"    hostname of PostgreSQL instance
+      --database-port=5432               port of the PostgreSQL instance
+      --database-user="defintly"         user of the PostgreSQL instance
+      --database-password=STRING         password of the PostgreSQL instance
+      --database-name="defintly"         name of the PostgreSQL instance database
+      --database-ssl-mode="disable"      enable/disable SSL connection to the PostgreSQL instance (see PostgreSQL
+                                         documentation of specific values to enable)
+
+Commands:
+  serve --database-password=STRING
+    Start the webserver.
+
+  import --database-password=STRING --excel-file=STRING
+    Import data.
+````
+
+Special parameters for ``serve``:
+````
+      --webserver-hostname="127.0.0.1"    ip to bind the webserver to
+      --webserver-port=4269               port to bind the webserver to
+````
+
+Special parameters for ``import``:
+````
+      --excel-file=STRING                Path to the excel file to import data from
+````
+
+Importing is available from a special formatted Excel file with sheets "Categories", "Collections", "Concepts" and "Criteria".
+
+Checkout the [Defintly site](https://defintly.glideapp.io) for more information. Also visit [The AGI Sentinel Initiative](http://agisi.org) for more research about Artificial General Intelligence.