feat: implement core Go application with web server

- Add Go modules with required dependencies (Gin, UUID, JWT, etc.)
- Implement main web server with landing page endpoint
- Add comprehensive API endpoints for health and status
- Include proper error handling and request validation
- Set up CORS middleware and security headers

output/Dockerfile.test

@@ -0,0 +1,17 @@
+# Test Dockerfile
+FROM golang:1.21-alpine AS tester
+
+WORKDIR /app
+
+# Install dependencies
+RUN apk add --no-cache curl bc jq
+
+# Copy go mod files
+COPY go.mod go.sum ./
+RUN go mod download
+
+# Copy source and tests
+COPY . ./
+
+# Run tests
+CMD ["sh", "tests/run_tests.sh"]