Create getting started section: Build a blockchain application

[Tschakki]

• Installation of SDK @Tschakki Describe Setup of SDK #237
• Verify installation by starting a white-label blockchain application @Tschakki
• Configure network-parameters @Tschakki Configuration of the blockchain application #233
  • Change the exposed genesisConfig parameters (Narrow the list of supported by framework network parameters lisk-sdk#3160) (mind the current Alpha SDK limitations)
  • How to override the default configuration
• Customize a blockchain application:
  • Copy Custom Transaction README overview @Tschakki (blocked by Create README for custom transactions lisk-sdk#3164) Create page about custom transaction types #234
  • Example blockchain application
    • Hello World @MaciejBaj Example blockchain application Hello World #235
    • Cashback @Tschakki Example blockchain application Cashback #236

Parent issue: #199