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في هذا الدرس

keep settings out of the code.

الموضوعات المخطط لها

• Configuration is anything that changes between places: database address, tax rate, API key.
• If it is in the code, you must rebuild to change it.
• The twelve-factor rule: separate config from code.
• Build the JAR once, run it anywhere with different settings.
• Do not write if (env.equals("prod")) in code.