{build,wasmserve}: use wasmserve, drop apple_pie

tools/wasmserve/README.md

@@ -0,0 +1,31 @@
+# mach/wasmserve
+
+Small web server specifically for serving Zig WASM applications in development
+
+## Getting started
+
+### Adding dependency
+
+In a `libs` subdirectory of the root of your project:
+
+```sh
+git clone https://github.com/machlibs/wasmserve
+```
+
+Then in your `build.zig` add:
+
+```zig
+...
+const wasmserve = @import("libs/wasmserve/wasmserve.zig");
+
+pub fn build(b: *Builder) void {
+    ...
+    const serve_step = try wasmserve.serve(exe, .{ .watch_paths = &.{"src/main.zig"} });
+    const run_step = b.step("run", "Run development web server");
+    run_step.dependOn(&serve_step.step);
+}
+```
+
+## Join the community
+
+Join the Mach community [on Discord](https://discord.gg/XNG3NZgCqp) or [Matrix](https://matrix.to/#/#hexops:matrix.org) to discuss this project, ask questions, get help, etc.