Initial commit: Full project structure

- Backend: NestJS with Docker
- Frontend: Next.js with Docker
- Nginx configuration for reverse proxy
- PostgreSQL setup
- Docker compose for orchestration
- Development environment configuration

backend/src/configs/configurations.ts

@@ -0,0 +1,53 @@
+// backend/src/config/configuration.ts
+export interface Config {
+  port: number;
+  database: {
+    url: string;
+  };
+  jwt: {
+    secret: string;
+    expiresIn: string;
+  };
+  throttle: {
+    ttl: number;
+    limit: number;
+  };
+}
+
+export default (): Config => {
+  // Helper function to get required env var with type safety
+  const getEnvVar = (key: string): string => {
+    const value = process.env[key];
+    if (!value) {
+      throw new Error(`❌ Environment variable ${key} is required but not set`);
+    }
+    return value;
+  };
+
+  // Helper for optional env vars with defaults
+  const getEnvVarWithDefault = (key: string, defaultValue: string): string => {
+    return process.env[key] || defaultValue;
+  };
+
+  const getEnvVarAsNumber = (key: string, defaultValue: number): number => {
+    const value = process.env[key];
+    if (!value) return defaultValue;
+    const parsed = parseInt(value, 10);
+    return isNaN(parsed) ? defaultValue : parsed;
+  };
+
+  return {
+    port: getEnvVarAsNumber('PORT', 3000),
+    database: {
+      url: getEnvVar('DATABASE_URL'),
+    },
+    jwt: {
+      secret: getEnvVar('JWT_SECRET'),
+      expiresIn: getEnvVarWithDefault('JWT_EXPIRES_IN', '7d'),
+    },
+    throttle: {
+      ttl: getEnvVarAsNumber('THROTTLE_TTL', 60),
+      limit: getEnvVarAsNumber('THROTTLE_LIMIT', 100),
+    },
+  };
+};