diff --git a/example/Dockerfile.hello b/example/Dockerfile.hello
new file mode 100644
index 0000000..334b0cd
--- /dev/null
+++ b/example/Dockerfile.hello
@@ -0,0 +1,12 @@
+From alpine as builder
+WORKDIR /src/example
+RUN apk add g++ make openssl-dev zlib-dev brotli-dev
+COPY ./httplib.h /src
+COPY ./example/hello.cc /src/example
+COPY ./example/Makefile /src/example
+RUN make hello
+
+From alpine
+RUN apk --no-cache add brotli libstdc++
+COPY --from=builder /src/example/hello /bin/hello
+CMD ["/bin/hello"]
diff --git a/example/Makefile b/example/Makefile
index f4c86eb..f37cc24 100644
--- a/example/Makefile
+++ b/example/Makefile
@@ -1,5 +1,5 @@
 #CXX = clang++
-CXXFLAGS = -std=c++11 -I.. -Wall -Wextra -pthread
+CXXFLAGS = -O2 -std=c++11 -I.. -Wall -Wextra -pthread
 
 PREFIX = /usr/local
 #PREFIX = $(shell brew --prefix)
diff --git a/example/hello.cc b/example/hello.cc
index 1590302..38d25a6 100644
--- a/example/hello.cc
+++ b/example/hello.cc
@@ -15,5 +15,5 @@ int main(void) {
     res.set_content("Hello World!", "text/plain");
   });
 
-  svr.listen("localhost", 8080);
+  svr.listen("0.0.0.0", 8080);
 }