Add Action to track dead links in docs

.github/workflows/docs.yml

@@ -0,0 +1,21 @@
+name: Documentation
+
+on:
+  schedule:
+    - cron: '0 0 * * 0'  # At 00:00 every Sunday
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+
+  markdown-check:
+    name: Check Markdown
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: gaurav-nelson/github-action-markdown-link-check@v1
+        with:
+          config-file: .github/workflows/mlc_config.json

.github/workflows/mlc_config.json

@@ -0,0 +1,5 @@
+{
+  "ignorePatterns": [
+    { "pattern": "^http:\/\/localhost:" }
+  ]
+}

README.md

@@ -280,7 +280,7 @@ The Kibana default configuration is stored in [`kibana/config/kibana.yml`][confi
 It is also possible to map the entire `config` directory instead of a single file.
 
 Please refer to the following documentation page for more details about how to configure Kibana inside Docker
-containers: [Running Kibana on Docker][kbn-docker].
+containers: [Install Kibana with Docker][kbn-docker].
 
 ### How to configure Logstash
 

extensions/apm-server/README.md

@@ -38,8 +38,7 @@ app.config['ELASTIC_APM'] = {
 }
 ```
 
-More configuration settings can be found for each language in the following documentation page: [Install APM
-agents][apm-agents].
+Configuration settings for each supported language are available in the APM documentation: [APM Agents][apm-agents].
 
 ## Checking connectivity and importing default APM dashboards
 
@@ -54,5 +53,5 @@ agents][apm-agents].
 [Running APM Server on Docker][apm-docker]
 
 
-[apm-agents]: https://www.elastic.co/guide/en/apm/get-started/current/agents.html
+[apm-agents]: https://www.elastic.co/guide/en/apm/get-started/current/components.html#_apm_agents
 [apm-docker]: https://www.elastic.co/guide/en/apm/server/current/running-on-docker.html