Merge pull request #983 from Concordium/factory-pattern

A user guide for the factory pattern.

Author: td202

source/mainnet/smart-contracts/guides/contract-dev-guides.rst

@@ -26,3 +26,4 @@ Once you are familiar with smart contracts, it is a good idea to read the :ref:`
    upgradeable-contract
    json-params
    migrate-contracts
+   factory-pattern

source/mainnet/smart-contracts/guides/factory-pattern.rst

@@ -625,8 +625,10 @@ Deploying and initializing smart contracts
 
 .. dropdown::  Can I create a factory smart contract on Concordium?
 
-    No. A factory smart contract on the Ethereum chain deploys other smart contracts. In contrast,
+    In short: no. A factory smart contract on the Ethereum chain deploys other smart contracts. In contrast,
     the ``init`` function has to be called by an account (not a smart contract) on the Concordium chain.
+    The guide to :ref:`using the factory pattern on Concordium<factory-pattern>` discusses
+    the alternatives and how to emulate the factory pattern.
 
 .. dropdown::  Can I predict/calculate the address of the smart contract before deploying it? Is there something similar to the Ethereum CREATE2?