Added arguments to make the server accessible remotely.

The original flags were requiring TLS be used, and that remote
machines be whitelisted. Those are now docker build arguments so
they can be disabled.

Also changed the instructions to tag the docker image so the
command is more consistent.

Dockerfile

@@ -2,6 +2,16 @@
 
 FROM golang:1.17.5-alpine3.15
 
+# Build arguments.
+#
+# Override on the docker command line with
+#   --build-arg USE_TSL_SOCKETS=false
+#   --build-arg ENABLE_HOST_CHECK=false
+#
+ARG USE_TSL_SOCKETS=true
+ARG ENABLE_HOST_CHECK=true
+
+
 # Install and download deps.
 RUN apk add --no-cache git curl python2 build-base openssl-dev openssl 
 RUN git clone https://github.com/webrtc/apprtc.git
@@ -21,7 +31,7 @@ RUN python apprtc/build/build_app_engine_package.py apprtc/src/ apprtc/out/ \
 
 # Wrap AppRTC GAE app in a bash script due to needing to run two apps within one container.
 RUN echo -e "#!/bin/sh\n" > /go/start.sh \
-    && echo -e "`pwd`/google-cloud-sdk/bin/dev_appserver.py --host 0.0.0.0 `pwd`/apprtc/out/app.yaml &\n" >> /go/start.sh
+    && echo -e "`pwd`/google-cloud-sdk/bin/dev_appserver.py --host 0.0.0.0 --enable_host_checking=$ENABLE_HOST_CHECK `pwd`/apprtc/out/app.yaml &\n" >> /go/start.sh
 
 # Collider setup
 # Go environment setup.
@@ -36,7 +46,7 @@ RUN ln -s `pwd`/apprtc/src/collider/collidermain $GOPATH/src \
     && go install collidermain
 
 # Add Collider executable to the start.sh bash script.
-RUN echo -e "$GOPATH/bin/collidermain -port=8089 -tls=true -room-server=http://localhost &\n" >> /go/start.sh
+RUN echo -e "$GOPATH/bin/collidermain -port=8089 -tls=$USE_TSL_SOCKETS -room-server=http://localhost &\n" >> /go/start.sh
 
 ENV STUNNEL_VERSION 5.60
 
@@ -71,9 +81,10 @@ CMD /go/start.sh
 
 ## Instructions (Tested on Debian 11 only):
 # - Download the Dockerfile from the AppRTC repo and put it in a folder, e.g. 'apprtc'
-# - Build the Dockerfile into an image: 'sudo docker build apprtc/'
-#   Note the image ID from the build command, e.g. something like 'Successfully built 503621f4f7bd'.
-# - Run: 'sudo docker run -p 443:443 -p 8089:8089 --rm -ti 503621f4f7bd'
+# - Build the Dockerfile into an image: 'sudo docker build apprtc/ --tag apprtc:latest'
+#   If you want to disable TLS (not recommended) add '--build-arg USE_TSL_SOCKETS=false' to that command.
+#   If you want to allow connection from any remote client, add '--build-arg ENABLE_HOST_CHECK=false'.
+# - Run: 'sudo docker run -p 443:443 -p 8080:8080 -p 8089:8089 --rm -ti apprtc:latest'
 #   The container will now run in interactive mode and output logging. If you do not want this, omit the '-ti' argument.
 #   The '-p' options are port mappings to the GAE app and Collider instances, the host ones can be changed.
 #