fixes #39 - Docker based install. Updates docs

Author: netops2devops

README.md

@@ -258,4 +258,4 @@ Using ACME with commercial CAs in enterprise environments provides several advan
 **Automation and Self-Service:**
 
 - Leverage standard ACME clients (Certbot, acme.sh, cert-manager.io) for certificate issuance, automatic renewals.
-- Enable self-service certificate requests for development teams
+- Enable self-service certificate requests for development and infrastructure teams

docs/content/install.md

@@ -147,12 +147,17 @@ Then follow the [pre-built binary](#pre-built-binary) instructions to create the
 
 ---
 
-## Docker
+## Install using Docker
 
-Make sure to
+Before starting the container on a linux distro
 
-- Configure the `ca.json` file 
-- Create a directory for `db`
+```sh
+mkdir -p /opt/acme-proxy/db
+touch /opt/acme-proxy/ca.json
+chown -R 65532:65532 /opt/acme-proxy
+```
+
+Make sure you have configured the `ca.json` file
 
 ```sh
 docker run -d \