diff --git a/docker/Dockerfile b/docker/Dockerfile
new file mode 100644
index 00000000..66e60a86
--- /dev/null
+++ b/docker/Dockerfile
@@ -0,0 +1,16 @@
+FROM debian:stretch
+
+# RUN yum install -y gcc-c++ make cmake openssl-devel gdb
+ENV DEBIAN_FRONTEND noninteractive
+RUN apt-get update 
+RUN apt-get -y install g++ 
+RUN apt-get -y install libssl-dev
+RUN apt-get -y install gdb
+RUN apt-get -y install screen
+RUN apt-get -y install procps
+RUN apt-get -y install lsof
+
+COPY . .
+
+WORKDIR examples/ws_connect
+RUN ["sh", "build_linux.sh"]
diff --git a/docker/Dockerfile.alpine b/docker/Dockerfile.alpine
new file mode 100644
index 00000000..ce720f23
--- /dev/null
+++ b/docker/Dockerfile.alpine
@@ -0,0 +1,11 @@
+FROM alpine:3.8
+
+RUN apk add --no-cache g++ musl-dev make cmake openssl-dev
+
+COPY . .
+
+WORKDIR examples/ws_connect
+RUN ["sh", "build_linux.sh"]
+
+EXPOSE 8765
+CMD ["ws_connect"]
diff --git a/docker/Dockerfile.centos b/docker/Dockerfile.centos
new file mode 100644
index 00000000..ce720f23
--- /dev/null
+++ b/docker/Dockerfile.centos
@@ -0,0 +1,11 @@
+FROM alpine:3.8
+
+RUN apk add --no-cache g++ musl-dev make cmake openssl-dev
+
+COPY . .
+
+WORKDIR examples/ws_connect
+RUN ["sh", "build_linux.sh"]
+
+EXPOSE 8765
+CMD ["ws_connect"]
diff --git a/docker/Dockerfile.debian b/docker/Dockerfile.debian
new file mode 100644
index 00000000..66e60a86
--- /dev/null
+++ b/docker/Dockerfile.debian
@@ -0,0 +1,16 @@
+FROM debian:stretch
+
+# RUN yum install -y gcc-c++ make cmake openssl-devel gdb
+ENV DEBIAN_FRONTEND noninteractive
+RUN apt-get update 
+RUN apt-get -y install g++ 
+RUN apt-get -y install libssl-dev
+RUN apt-get -y install gdb
+RUN apt-get -y install screen
+RUN apt-get -y install procps
+RUN apt-get -y install lsof
+
+COPY . .
+
+WORKDIR examples/ws_connect
+RUN ["sh", "build_linux.sh"]
diff --git a/docker/Dockerfile.gcc b/docker/Dockerfile.gcc
new file mode 100644
index 00000000..411a7db2
--- /dev/null
+++ b/docker/Dockerfile.gcc
@@ -0,0 +1,8 @@
+FROM gcc:8
+
+# RUN yum install -y gcc-c++ make cmake openssl-devel gdb
+
+COPY . .
+
+WORKDIR examples/ws_connect
+RUN ["sh", "build_linux.sh"]
diff --git a/ixwebsocket/IXWebSocketTransport.cpp b/ixwebsocket/IXWebSocketTransport.cpp
index 1b4eb0b2..4e7cb795 100644
--- a/ixwebsocket/IXWebSocketTransport.cpp
+++ b/ixwebsocket/IXWebSocketTransport.cpp
@@ -454,6 +454,7 @@ namespace ix {
             if (_rxbuf.size() < 2) return; /* Need at least 2 */
             const uint8_t * data = (uint8_t *) &_rxbuf[0]; // peek, but don't consume
             ws.fin = (data[0] & 0x80) == 0x80;
+            ws.rsv1 = (data[0] & 0x40) == 0x40;
             ws.opcode = (wsheader_type::opcode_type) (data[0] & 0x0f);
             ws.mask = (data[1] & 0x80) == 0x80;
             ws.N0 = (data[1] & 0x7f);
diff --git a/ixwebsocket/IXWebSocketTransport.h b/ixwebsocket/IXWebSocketTransport.h
index a6936d6a..e2dbbfec 100644
--- a/ixwebsocket/IXWebSocketTransport.h
+++ b/ixwebsocket/IXWebSocketTransport.h
@@ -98,6 +98,7 @@ namespace ix
         struct wsheader_type {
             unsigned header_size;
             bool fin;
+            bool rsv1;
             bool mask;
             enum opcode_type {
                 CONTINUATION = 0x0,