message: Fix readme to explain the new installation & streamlit running
diff: # Cardpay reward program
  -This repository is the code for reward rules. A reward rule is a piece of code that a reward program uses to issue different types of rewards to it's rewardees, e.g. cashback, airdrops. A single reward program can have multiple reward rules. The rules defined are shared across reward programs.
  -
  -Reward rule defines:
  -
  -- the business logic of the reward, e.g. each merchant that receives minimum 100 spend will receive 10 card tokens. This business logic will run as a job from `some_block < x <= some_block + payment_cycle_length`.
  -- the frequency the rule is computed, e.g. every month. Each rule run will recur over several jobs over `start_block < x <= end_block` -- a moving window.
  -
  -For example,
  -
  -```
  -start_block=1
  -end_block=10
  -payment_cycle_length=2
  -
  -rule.run(1,3) #checking "which merchant receives > 100 spend" for 1< block <=3
  -rule.run(3,5)
  -rule.run(5,7)
  -rule.run(7,9)
  -rule.run(9,10)
  -```
  +This repository is the code for reward rules. A reward rule is a piece of code that a reward program uses to issue different types of rewards to it's rewardees, e.g. cashback, airdrops. The rules defined are shared across reward programs.
  ## Setup
  @@ -44,6 +25,6 @@ Launch the exploratory streamlit based interface:
  ## Docker
  -Each individual program can be built
  +Each individual program can be built by specifying the rule class name as a build argument, for example:
  - docker build -t reward_rules --no-cache .
  + docker build --build-arg rule=FlatPayment -t flat_payment .
  