Updated binary version from v0.3.2 to v0.4.0

Dockerfile

@@ -12,7 +12,7 @@ WORKDIR /skyway
 # glibc packages for Alpine Linux are prepared by Sasha Gerrand and the releases are published in sgerrand/alpine-pkg-glibc github repo.
 # https://github.com/sgerrand/alpine-pkg-glibc
 RUN apk add --no-cache --virtual tmpPackages ca-certificates wget && \
-    wget https://github.com/skyway/skyway-webrtc-gateway/releases/download/0.3.2/gateway_linux_x64 && \
+    wget https://github.com/skyway/skyway-webrtc-gateway/releases/download/0.4.0/gateway_linux_x64 && \
     chmod +x ./gateway_linux_x64 && \
     wget -q -O /etc/apk/keys/sgerrand.rsa.pub https://alpine-pkgs.sgerrand.com/sgerrand.rsa.pub && \
     wget https://github.com/sgerrand/alpine-pkg-glibc/releases/download/2.29-r0/glibc-2.29-r0.apk && \