added otel module to nginx

nginx/Dockerfile

@@ -10,9 +10,11 @@ RUN --mount=type=cache,target=/var/cache/apk apk add \
 	bind-tools \
 	binutils \
 	build-base \
+	c-ares-dev \
 	ca-certificates \
 	cmake \
 	gcc \
+	g++ \
 	gd-dev \
 	geoip-dev \
 	git \
@@ -82,6 +84,15 @@ WORKDIR /home/luser
 ADD --chown=luser:luser --chmod=755 ./build-rtmp.sh ./build-rtmp.sh
 RUN ./build-rtmp.sh
 
+FROM build AS build-otel
+ADD --chown=luser:luser https://github.com/nginx/nginx-otel.git#v0.1.2 /nginx-otel
+USER luser
+RUN cmake -G Ninja -B /home/luser/otel-build -S /nginx-otel \
+       -DNGX_OTEL_NGINX_BUILD_DIR=/nginx/objs \
+       -DCMAKE_BUILD_TYPE=Release \
+       && cmake --build /home/luser/otel-build
+
+
 FROM base AS release
 ARG VERSION
 ENV NGINX_VERSION=${VERSION}
@@ -99,6 +110,7 @@ RUN --mount=type=cache,target=/var/cache/apk \
 	 (cd nginx && sh /install.sh)
 RUN --mount=type=cache,target=/var/cache/apk apk del .install_deps
 COPY --from=build-rtmp --chown=root:root /nginx/objs/ngx_rtmp_module.so /usr/lib/nginx/modules/
+COPY --from=build-otel --chown=root:root /home/luser/otel-build/ngx_otel_module.so /usr/lib/nginx/modules/
 COPY --from=build /home/luser/libressl/openssl.cnf /etc/ssl/openssl.cnf
 COPY conf/nginx.conf /etc/nginx/nginx.conf
 COPY conf/dhparam /etc/nginx/dhparam