Feature/static files (#456)

* Added mapping

* Added documentation

src/main/java/ca/uhn/fhir/jpa/starter/ExtraStaticFilesConfigurer.java

@@ -0,0 +1,22 @@
+package ca.uhn.fhir.jpa.starter;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Configuration
+@ConditionalOnProperty(prefix = "hapi.fhir", name = "staticLocation")
+public class ExtraStaticFilesConfigurer implements WebMvcConfigurer {
+
+	@Autowired
+	AppProperties appProperties;
+
+	@Override
+	public void addResourceHandlers(ResourceHandlerRegistry theRegistry) {
+		theRegistry
+			.addResourceHandler("/static/**")
+		.addResourceLocations(appProperties.getStaticLocation());
+	}
+}