fix markdown lint issues in README

README.md

@@ -7,6 +7,7 @@
 * **Kaehmy:** Form for creating and listing kaehmys
 * **Ohlhafv:** Form for creating and listing ohlhafv challenges.
 * **Infoscreen:** Angular-based slideshow app for the guild room's screens.
+
 ## Installation
 
 Set up your SSH key authentication in GitLab Profile Settings. Then clone the repository and checkout the development branch:
@@ -18,6 +19,7 @@ git checkout develop
 ```
 
 Copy env file for local use:
+
 ```bash
 cp .env.dev .env
 ```
@@ -42,7 +44,7 @@ python3 -m poetry config virtualenvs.in-project true
 
 We use Node.js for few development tasks, like linting. Easiest way to install Node is [nvm](https://github.com/nvm-sh/nvm). After installing install dependencies:
 
-```
+```bash
 npm install
 ```
 
@@ -53,6 +55,7 @@ TODO: List scripts
 To run a local development database **[docker](https://docs.docker.com/engine/install/)** is recommended. If you want to additianally use a db management tool **[pgAdmin](https://www.pgadmin.org/download/)** is nice.
 
 After installing docker use the following to create a database:
+
 ```bash
 docker run --name sik.web.db -e POSTGRES_PASSWORD=postgres -p 5432:5432 -d postgres:12
 ```