HTTPS instructions for CloudFlare (#574)

* HTTPS instructions for CloudFlare

* Adding DNS configuration image

* Update HTTPS.md

* Update HTTPS.md

deploy/HTTPS.md

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+# Cloudflare configuration
+
+- Login to [Cloudflare](https://www.cloudflare.com/) and click "+ Add Site"
+- Enter the domain name that will be used to host the site. (e.g. dpcreator.org)
+- Choose a plan 
+  - (Note: Currently using the "Free" plan for demo/dev sites)
+- You will see a set of DNS records taken from the current registrar. Check these records against the registrar and make sure all the entries are there. Add any that are missing. 
+- Click continue
+- Select "Full encryption"
+- Scroll down and activate the switch that says "Always use HTTPS"
+
+
+## DNS configuration 
+
+**DP Creator configuration**
+For each subdomain, we need to decide if CloudFlare should route its traffic. A row for the domain dev.dpcreator.org should look like: 
+
+| Type      | Name    | Content        | Proxy Status | TTL |
+|-----------|---------|----------------|----------|---------|
+| A         |   dev   |   (ip address) | Proxied  |   auto  |
+
+- Applies to: demo.dpcreator.org, dev.dpcreator.org
+
+**Dataverse configuration**
+For any subdomains which should not be routed through CloudFlare, they should be left as "DNS only" like so:
+
+| Type      | Name    | Content        | Proxy Status | TTL     |
+|-----------|---------|----------------|--------------|---------|
+| A         |   demo  |  (ip address)  | DNS only     |   auto  |
+
+- Applies to: demo-dataverse.dpcreator.org, dev-dataverse.dpcreator.org
+
+
+The final DNS configuration should look like this:
+
+![dns_record](dns.png)