Adds a first version of the wiki documentation

Contains:

• CLI user doc
• Assignment creation tutorial
• How to perform exercise tutorial

.gitlab-ci.yml

@@ -70,7 +70,7 @@ variables:
 
 .build_cli:
     script:
-        - cd NodeApp
+        - cd "${PROJECT_FOLDER}"
 
         # Install dependencies
         - npm install
@@ -170,7 +170,7 @@ build:version:
 
         - |
             echo "Replace DOTENV_KEY if we are on a protected branch" # Hide the print of the DOTENV_PROD_KEY
-            sed -r "s/(DOTENV_KEY[ ]*:[ ]*[\'\"\`])[^'\"\`]*([\'\"\`])/\${DOTENV_PROD_KEY}\2/g" src/app.ts > src/app.ts;
+            sed -r "s/(DOTENV_KEY[ ]*:[ ]*[\'\"\`])[^'\"\`]*([\'\"\`])/\${DOTENV_PROD_KEY}\2/g" ${PROJECT_FOLDER}/src/app.ts > ${PROJECT_FOLDER}/src/app.ts;
 
         # Build
         - !reference [.build_cli, script]