{build,wasmserve}: use wasmserve, drop apple_pie

tools/wasmserve/build.zig

@@ -0,0 +1,15 @@
+const std = @import("std");
+const wasmserve = @import("wasmserve.zig");
+
+pub fn build(b: *std.build.Builder) !void {
+    const mode = b.standardReleaseOptions();
+
+    const exe = b.addSharedLibrary("test", "test/main.zig", .unversioned);
+    exe.setBuildMode(mode);
+    exe.setTarget(.{ .cpu_arch = .wasm32, .os_tag = .freestanding, .abi = .none });
+    exe.install();
+
+    const serve_step = try wasmserve.serve(exe, .{ .watch_paths = &.{"wasmserve.zig"} });
+    const run_step = b.step("test", "Start a testing server");
+    run_step.dependOn(&serve_step.step);
+}