Enhance documentation with Docusaurus features and fix inaccuracies

Verified against source code and enhanced with Docusaurus markdown features:

Documentation Accuracy Fixes:
- Fixed acme.md: Added "letsencrypt" as valid AUTOCONFIG value (was incorrectly shown as "-")
- Added reference to ACME docs from environment-variable.md
- Verified all features against actual implementation in /src

Docusaurus Enhancements Added:
- Admonitions (:::note, :::tip, :::warning, :::danger, :::info) for important callouts
- Code block titles for all bash/yaml examples (e.g., title="Install EasyHAProxy")
- Better structured warnings and notes for limitations
- Improved formatting and readability throughout

Files Enhanced:
- kubernetes.md: Added info boxes, warnings, code titles
- docker.md: Added limitation warnings, code titles
- swarm.md: Added advantage tips, limitation warnings
- acme.md: Fixed Let's Encrypt autoconfig, enhanced requirements with admonitions
- ssl.md: Added code block titles for all examples
- static.md: Added live reload tip, SSL certificate note
- container-labels.md: Added definition explanation, code titles
- limitations.md: Restructured with clear warnings and explanations
- helm.md: Added warnings, code titles
- microk8s.md: Added ingress controller warning, code titles
- volumes.md: Added info box about volume purposes
- other.md: Added code block titles
- environment-variable.md: Added ACME reference note

All changes verified against actual Python source code implementation.

docs/helm.md

@@ -10,9 +10,11 @@ Helm is a package manager for Kubernetes. It allows you to install and manage ap
 
 ### 1) Identify the node where your EasyHAProxy container will run
 
-EasyHAProxy will be limited to a single node. To understand that see [limitations](limitations.md) page.
+:::warning Single Node Deployment
+EasyHAProxy will be limited to a single node. To understand why, see the [limitations](limitations.md) page.
+:::
 
-```bash
+```bash title="List available nodes"
 $ kubectl get nodes
 
 NAME      STATUS   ROLES    AGE    VERSION
@@ -22,15 +24,15 @@ node-02   Ready    <none>   561d   v1.21.13-3
 
 Add the EasyHAProxy label to the node.
 
-```bash
+```bash title="Label the node for EasyHAProxy"
 kubectl label nodes node-01 "easyhaproxy/node=master"
 ```
 
 ### 2) Install EasyHAProxy
 
-Minimal configuration
+Minimal configuration:
 
-```bash
+```bash title="Install with Helm (minimal)"
 helm repo add byjg https://opensource.byjg.com/helm
 helm repo update byjg
 kubectl create namespace easyhaproxy
@@ -43,7 +45,7 @@ helm upgrade --install ingress byjg/easyhaproxy \
 
 Customizing Helm Values:
 
-```yaml
+```yaml title="values.yaml"
 easyhaproxy:
   stats:
     username: admin