Update installation instructions

README.md

@@ -11,17 +11,27 @@ It's based on the availibity of all participants for specific days.
 - [Flowchart](https://app.diagrams.net/#Uhttps://git.armada.digital/meeting-planner/documentation/raw/branch/master/meetingscheduler.drawio)
 
 
-## Backend installation
+## Installation
 
-### 1 | Create a database on Postgres
-Any up to date postgres should work.
-You will need the following informations:
-- username
-- password
-- hostname
-- database
+### 0 | Requirements
+Meeting Planner runs on virtually any system where Node.js is supported.
+This means it runs on Linux, macOS, Windows as well as container solutions such as Docker / Kubernetes and Heroku.
 
-### 2 | Create and/or configure an `.env` file
+**Versions**
+- Postgres 9.5 or later
+- NodeJS 10.12 or later
+
+*[KnexJS](https://knexjs.org/), the database driver used is compatible with other databases like MySQL.
+With small adaptation, it should be possible to use them, but this has not been tested.*
+
+### 1 | Configure Postgres to use UTC
+
+** Make sure that Postgres database used is configured to UTC **
+`SET TIME ZONE 'UTC';`
+
+See [Postgres Documentation](https://www.postgresql.org/docs/current/sql-set.html)
+
+### 2 | Create and/or configure environement variables
 
 - Create a `.env` file at the root of the backend folder
 - Replace all variables noted with `$` below, and save it to the `.env` file
@@ -32,17 +42,17 @@ PORT=$port_number
 DATABASE_URL=postgres://$db_user:$db_user_password@$hostname:5432/$db_name
 JWT_SECRET=$long_random_characters
 ```
-### 3 | Installation of packages (NodeJS needs to be installed)
+### 3 | Installation of packages with npm
 - `npm i`
 
-### Migrate tables to database
+### 4 | Migrate tables to database
 - `npx knex migrate:latest`
 
-### Seed database with dummy content (optional)
-Running this will add some users and meetings.
+### 5 | Seed database with dummy content **(optional)**
+Running this will add some accounts along with some meetings.
 - `npx knex seed:run`
 
-**List of users**
+**Accounts created**
 
 | Liza             | Emile             | Jack             | Cynthia             | Celine             |
 | :--------------- | :---------------- | :--------------- | :------------------ | :----------------- |