Added instructions for upgrading from release and source

README.md

@@ -15,10 +15,10 @@ Open source Discord bot for quizzes and quest-like events.
 ### Installation from release
 
 1. Download the release archive from [Releases](https://git.end-play.xyz/profitroll/QuizBot/releases)
-2. Unpack the archive to a folder of your choice
-3. Go to the project folder
+2. Unpack the archive to a directory of your choice
+3. Go to the project's directory
 4. Create a virtual environment: `python3 -m venv .venv`
-5. Activate virtual environment:
+5. Activate the virtual environment:
     - Linux: `source .venv/bin/activate`
     - Windows (cmd): `.venv/bin/activate.bat`
     - Windows (PowerShell): `.venv/bin/activate.ps1`
@@ -26,11 +26,13 @@ Open source Discord bot for quizzes and quest-like events.
 7. Copy example config to a real file: `cp config_example.json config.json`
 8. Configure the bot (see [Configuration](#configuration))
 9. Start the bot: `python main.py`
+10. The bot can be stopped by a keyboard interrupt (`Ctrl+C`) and a virtual environment can be deactivated using
+    `deactivate`
 
 ### Installation from source
 
 1. Clone the repository: `git clone https://git.end-play.xyz/profitroll/QuizBot.git`
-2. Go to the project's folder: `cd QuizBot`
+2. Go to the project's directory: `cd QuizBot`
 3. Continue from step 4 of [Installation from release](#installation-from-release)
 
 ## Configuration
@@ -39,7 +41,29 @@ TODO
 
 ## Upgrading
 
-TODO
+### Upgrading from release
+
+Installing over the older version is not supported. Fresh installation is necessary to prevent data corruption.
+
+1. Make a backup of the project's directory. Some of the old files will be reused
+2. Follow the [Installation from release](#installation-from-release) from the beginning and stop before 7th step
+3. Copy file `config.json` and directory `data` from the backup you made into the new installation's directory
+4. While still in the virtual environment, migrate the database: `python main.py --migrate`
+
+After these steps are performed, the bot is ready to be started and used.
+
+### Upgrading from source
+
+1. Make a backup of the project's directory
+2. Go to the project's directory
+3. Update the project: `git pull`
+4. Activate the virtual environment:
+    - Linux: `source .venv/bin/activate`
+    - Windows (cmd): `.venv/bin/activate.bat`
+    - Windows (PowerShell): `.venv/bin/activate.ps1`
+5. Migrate the database: `python main.py --migrate`
+
+After these steps are performed, the bot is ready to be started and used.
 
 ## Usage
 
@@ -51,4 +75,4 @@ TODO
    Only admins should have access to following commands: `/config`, `/event`, `/stage` and `/user`.  
    Allowing access to `/status` is not recommended, however won't do any harm if done so.
 3. Configure bot for usage on your server using `/config set` providing all the necessary arguments.  
-   Timezones are compatible with summer time (e.g. `CET` will be interpreted as `CEST` during summer time).
+   Timezones are compatible with daylight saving time (e.g. `CET` will be interpreted as `CEST` during daylight saving).