chore(ci): add markdown dead link checking

.devcontainer/README.md

@@ -47,7 +47,7 @@ You can customize **settings** and **extensions** in the [devcontainer.json](dev
 
 ### Entrypoint script
 
-You can bind mount a shell script to `/root/.welcome.sh` to replace the [current welcome script](shell/.welcome.sh).
+You can bind mount a shell script to `/root/.welcome.sh` to replace the [current welcome script](https://github.com/qdm12/godevcontainer/blob/master/shell/.welcome.sh).
 
 ### Publish a port
 

.github/workflows/markdown.yml

@@ -27,6 +27,10 @@ jobs:
           pattern: |
             *.md
 
+      - uses: gaurav-nelson/github-action-markdown-link-check@v1
+        with:
+          use-quiet-mode: yes
+
       - uses: peter-evans/dockerhub-description@v3
         if: github.repository == 'qdm12/gluetun'
         with:

README.md

@@ -127,4 +127,4 @@ services:
 
 ## License
 
-[![MIT](https://img.shields.io/github/license/qdm12/gluetun)](https://github.com/qdm12/gluetun/master/LICENSE)
+[![MIT](https://img.shields.io/github/license/qdm12/gluetun)](https://github.com/qdm12/gluetun/blob/master/LICENSE)