add apple_pie hello world

src/main.zig

@@ -1,5 +1,19 @@
 const std = @import("std");
+const http = @import("apple_pie");
 
 pub fn main() anyerror!void {
     std.log.info("All your codebase are belong to us.", .{});
+
+    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+    defer _ = gpa.deinit();
+
+    try http.listenAndServe(
+        &gpa.allocator,
+        try std.net.Address.parseIp("127.0.0.1", 8080),
+        index,
+    );
+}
+
+fn index(response: *http.Response, request: http.Request) !void {
+    try response.writer().writeAll("Hello Zig!");
 }