feat: add example

example/main.cpp

@@ -0,0 +1,15 @@
+#include <httpserver.hpp>
+using namespace httpserver;
+class hello_world_resource : public http_resource {
+public:
+  std::shared_ptr<http_response> render(const http_request&) {
+    return std::shared_ptr<http_response>(new string_response("Hello, World!"));
+  }
+};
+int main(int argc, char** argv) {
+  webserver ws = create_webserver(8080);
+  hello_world_resource hwr;
+  ws.register_resource("/hello", &hwr);
+  ws.start(true);
+  return 0;
+}

example/makefile

@@ -0,0 +1,20 @@
+#target: dependency_1 dependency_2 dependency_3 ...
+#	command
+#
+RM = /bin/rm -f
+OBJ = main.o
+EXE = main
+CC = /usr/bin/g++
+CXXFLAGS = -Wall
+LDFLAGS = -L/usr/local/lib -lhttpserver
+#
+all: $(EXE)
+#
+$(EXE): $(OBJ)
+	$(CC) $(CXXFLAGS) $(LDFLAGS) $(OBJ) -o $(EXE)
+#
+main.o: main.cpp
+	$(CC) -c main.cpp -o main.o
+#
+clean:
+	$(RM) $(OBJ) $(EXE) *~