Make installation instructions more comprehensive

README.md

@@ -113,13 +113,13 @@ Check out how in the INSTALL section.
 
 1) Install [Go 1.9 or newer](https://golang.org/doc/install)
 
-2) Install acme-dns: `go get github.com/joohoi/acme-dns/...`
+2) Install acme-dns: `go get github.com/joohoi/acme-dns/...`. This will install acme-dns to `~/go/bin/acme-dns`.
 
 3) Edit config.cfg to suit your needs (see [configuration](#configuration)). `acme-dns` will read the configuration file from `/etc/acme-dns/config.cfg` or `./config.cfg`
 
 4) Run acme-dns. Please note that acme-dns needs to open a privileged port (53, domain), so it needs to be run with elevated privileges.
 
-## Using Docker
+### Using Docker
 
 1) Pull the latest acme-dns Docker image: `docker pull joohoi/acme-dns` 
 
@@ -139,7 +139,7 @@ docker run --rm --name acmedns                 \
  -d joohoi/acme-dns
 ```
 
-## Docker Compose
+### Docker Compose
 
 1) Create directories: `config` for the configuration file, and `data` for the sqlite3 database.
 
@@ -149,6 +149,49 @@ docker run --rm --name acmedns                 \
 
 4) Edit the `config/config.cfg` and `docker-compose.yml` to suit your needs, and run `docker-compose up -d`
 
+## DNS Records
+
+Note: In this documentation:
+- `example.com` is your domain name
+- `auth.example.com` is the subdomain you want to use for acme-dns
+- `198.51.100.1` is the **public** IP address of the system running acme-dns  
+
+These values should be changed based on your environment.
+
+You will need to add some DNS records on your domain's regular DNS server:
+- `NS` record for `auth.example.com` pointing to `ns.auth.example.com`
+- `A` record for `ns.auth.example.com` pointing to `198.51.100.1`
+- If using IPv6, an `AAAA` record pointing to the IPv6 address
+- Each domain you will be authenticating will need a `CNAME` for a `_acme-challenge` subdomain added. The [client](README.md#clients) you use will explain how to do this.
+
+## Testing It Out
+
+You may want to test that acme-dns is working before using it for real queries.
+
+1) Confirm that DNS lookups for the acme-dns subdomain works as expected: `dig auth.example.com`
+
+2) Call the `/register` API endpoint to register a test domain:
+```
+$ curl -X POST http://auth.example.com/register
+{"username":"eabcdb41-d89f-4580-826f-3e62e9755ef2","password":"pbAXVjlIOE01xbut7YnAbkhMQIkcwoHO0ek2j4Q0","fulldomain":"d420c923-bbd7-4056-ab64-c3ca54c9b3cf.auth.example.com","subdomain":"d420c923-bbd7-4056-ab64-c3ca54c9b3cf","allowfrom":[]}
+```
+
+3) Call the `/update` API endpoint to set a test TXT record. Pass the `username`, `password` and `subdomain` received from the `register` call performed above:
+```
+$ curl -X POST \
+  -H "X-Api-User: eabcdb41-d89f-4580-826f-3e62e9755ef2" \
+  -H "X-Api-Key: pbAXVjlIOE01xbut7YnAbkhMQIkcwoHO0ek2j4Q0" \
+  -d '{"subdomain": "d420c923-bbd7-4056-ab64-c3ca54c9b3cf", "txt": "___validation_token_recieved_from_the_ca___"}' \
+  http://auth.example.com/update
+```
+
+Note: The `txt` field must be exactly 43 characters long, otherwise acme-dns will reject it
+
+4) Perform a DNS lookup to the test subdomain to confirm that everything is working properly: 
+```
+$ dig @ns.auth.example.com d420c923-bbd7-4056-ab64-c3ca54c9b3cf.auth.example.com
+```
+
 ## Configuration
 
 ```bash