Format README

README.md

@@ -115,7 +115,7 @@ tutorial:
 
 ## :arrow_forward: Video : Introduction to Keyrock
 
-[![](https://fiware.github.io/tutorials.Step-by-Step/img/video-logo.png)](https://www.youtube.com/watch?v=dHyVTan6bUY "Introduction")
+[![](https://fiware.github.io/tutorials.Step-by-Step/img/video-logo.png)](https://www.youtube.com/watch?v=dHyVTan6bUY 'Introduction')
 
 Click on the image above to see an introductory video
 
@@ -178,8 +178,8 @@ keyrock:
     depends_on:
         - mysql-db
     ports:
-        - "3005:3005"
-        - "${KEYROCK_HTTPS_PORT}:${KEYROCK_HTTPS_PORT}" # localhost:3443
+        - '3005:3005'
+        - '${KEYROCK_HTTPS_PORT}:${KEYROCK_HTTPS_PORT}' # localhost:3443
     environment:
         - IDM_DB_HOST=mysql-db
         - IDM_DB_PASS_FILE=/run/secrets/my_secret_data
@@ -250,14 +250,14 @@ mysql-db:
     hostname: mysql-db
     container_name: db-mysql
     expose:
-        - "3306"
+        - '3306'
     ports:
-        - "3306:3306"
+        - '3306:3306'
     networks:
         - default
     environment:
-        - "MYSQL_ROOT_PASSWORD_FILE=/run/secrets/my_secret_data"
-        - "MYSQL_ROOT_HOST=172.18.1.5"
+        - 'MYSQL_ROOT_PASSWORD_FILE=/run/secrets/my_secret_data'
+        - 'MYSQL_ROOT_HOST=172.18.1.5'
     volumes:
         - mysql-db:/var/lib/mysql
     secrets:
@@ -351,7 +351,7 @@ obtain a new token.
 
 ## :arrow_forward: Video : Creating User Accounts with the Keyrock GUI
 
-[![](https://fiware.github.io/tutorials.Step-by-Step/img/video-logo.png)](https://www.youtube.com/watch?v=dtKsjGbJ7Xc "Creating User Accounts")
+[![](https://fiware.github.io/tutorials.Step-by-Step/img/video-logo.png)](https://www.youtube.com/watch?v=dtKsjGbJ7Xc 'Creating User Accounts')
 
 Click on the image above to see a video demonstrating how to create users with the **Keyrock** GUI