Rename HOWTO.md to CONTRIBUTING.md

Github monitors the "CONTRIBUTING.md" for the "Community" feature. This falls under that. I feel this would be better listed as that feature instead of a seperate Markdown that Github has no special features for.

CONTRIBUTING.md

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+# So you want to make an Egg
+
+## General rules
+
+1. Keep it simple.  
+    We don't need 8 miles of install script
+2. Keep it Small.  
+    Only use what is absolutely needed.
+3. Try to stay in the stock containers.  
+    If you need something in a container PR it to [my image repo](https://github.com/parkervcp/images) where I can review and pull up to the main repo.
+
+## Step 1.
+#### Be aware of the pterodactyl install process.
+
+The Pterodactyl install process is fairly simple once you know.
+    
+    1. Spin up install container
+        This uses a volume mount on /mnt/server for the server files.
+        This can pull or set up all that is needed to run the server.
+        It is regularly used to just download the files required. Such as server files and configs.
+        
+    2. Stop install container
+    
+    3. Start a new container with the server files in /home/container
+        This is where the server is actually run.
+        Any dependencies installed during the install process are gone.
+        The container that is started should have everything you need.
+
+## Step 2.
+#### Testing
+
+Make sure your install process is rock solid as I will be testing eggs before they ever hit my repo.
+
+I will make sugestions and changes at will.  
+This is to maintain a clean repo that others can pull and be fully aware of what is being done.
+
+
+## Step 3.
+#### Don't be afraid to submit PR's to the egg repo.
+
+I dont bite. I will work with you on the egg and the required things to run it.