fixes CI/linter failed: E: Package 'nodejs-dev' has no installation candidate #8 (#9)

* fixes CI/linter failed: E: Package 'nodejs-dev' has no installation candidate #8

fixed ubuntu version and updated package names

* fixed path to be scanned

* excluding node_modules folder

Author: ChristianKuehnel

.github/workflows/markdownlint.yml

@@ -10,7 +10,8 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    # set specific OS version
+    runs-on: ubuntu-20.04
     steps:
     - uses: actions/checkout@v1
 
@@ -19,9 +20,10 @@ jobs:
     - name: install markdownlint-cli
       run: |
         sudo apt-get update       
-        sudo apt-get install -y npm sudo nodejs-dev node-gyp libssl1.0-dev
+        sudo apt-get install -y npm sudo nodejs node-gyp libssl-dev
         npm install markdownlint-cli
 
     - name: lint markdown files
-      # conly scan the /content folder
-      run: node_modules/.bin/markdownlint content
+      # scan all files, exclude the "node_modules" as this contains the tool
+      # itself
+      run: node_modules/.bin/markdownlint --ignore node_modules .