Removed useless build of musl and updated examples

- Zig 0.12 package was moved from Alpine's Edge Testing to Edge
  Community

examples/dealer_rep_client/build.zig

@@ -29,7 +29,7 @@ pub fn build(b: *std.Build) void {
         .optimize = optimize,
     });
 
-    exe.addModule("zzmq", zzmq.module("zzmq"));
+    exe.root_module.addImport("zzmq", zzmq.module("zzmq"));
 
     exe.linkSystemLibrary("zmq");
     exe.linkLibC();

examples/dealer_rep_server/build.zig

@@ -29,7 +29,7 @@ pub fn build(b: *std.Build) void {
         .optimize = optimize,
     });
 
-    exe.addModule("zzmq", zzmq.module("zzmq"));
+    exe.root_module.addImport("zzmq", zzmq.module("zzmq"));
 
     exe.linkSystemLibrary("zmq");
     exe.linkLibC();

examples/hello_world_client/build.zig

@@ -29,7 +29,7 @@ pub fn build(b: *std.Build) void {
         .optimize = optimize,
     });
 
-    exe.addModule("zzmq", zzmq.module("zzmq"));
+    exe.root_module.addImport("zzmq", zzmq.module("zzmq"));
 
     exe.linkSystemLibrary("zmq");
     exe.linkLibC();

examples/hello_world_server/build.zig

@@ -29,7 +29,7 @@ pub fn build(b: *std.Build) void {
         .optimize = optimize,
     });
 
-    exe.addModule("zzmq", zzmq.module("zzmq"));
+    exe.root_module.addImport("zzmq", zzmq.module("zzmq"));
 
     exe.linkSystemLibrary("zmq");
     exe.linkLibC();

test.Dockerfile

@@ -1,30 +1,11 @@
 FROM alpine:3.19 as builder
 
-# Install necessary tools for building musl
-RUN apk add --no-cache clang make
-
-# Download musl source code
-RUN wget https://musl.libc.org/releases/musl-1.2.4.tar.gz
-
-# Extract the source code
-RUN tar -xzvf musl-1.2.4.tar.gz
-
-# Navigate into the musl directory
-WORKDIR /musl-1.2.4
-
-# Configure, build, and install musl
-RUN ./configure && make && make install
-
-# Cleanup
-WORKDIR /
-RUN rm -rf /musl-1.2.4 musl-1.2.4.tar.gz
-
 # install Zig 0.12 from Alpine edge repo: https://pkgs.alpinelinux.org/package/edge/testing/x86_64/zig
-RUN echo "@testing https://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories
-RUN apk add --no-cache zig@testing~=0.12.0
+RUN echo "@edge-community https://dl-cdn.alpinelinux.org/alpine/edge/community" >> /etc/apk/repositories
+RUN apk add --no-cache zig@edge-community~=0.12.0
 
 # install dependencies
-RUN apk add --no-cache zeromq-dev
+RUN apk add --no-cache zeromq-dev clang
 
 COPY . /build/