🐋 Bump versions in Dockerfile (#61)

* Bump janus version in dockerfile
* Bump libnice version in dockerfile
* Bump gcc version in dockerfile

Dockerfile

@@ -1,14 +1,17 @@
 FROM ubuntu:20.04
 
-RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get -y install curl git libmicrohttpd-dev libjansson-dev libssl-dev libsofia-sip-ua-dev libglib2.0-dev libopus-dev libogg-dev libcurl4-openssl-dev liblua5.3-dev libconfig-dev pkg-config gengetopt libtool automake python3 python3-pip python3-setuptools python3-dev python3-wheel ninja-build libavcodec-dev
+RUN \
+    apt-get update && \
+    DEBIAN_FRONTEND=noninteractive apt-get -y install curl g++-10 git libmicrohttpd-dev libjansson-dev libssl-dev libsofia-sip-ua-dev libglib2.0-dev libopus-dev libogg-dev libcurl4-openssl-dev liblua5.3-dev libconfig-dev pkg-config gengetopt libtool automake python3 python3-pip python3-setuptools python3-dev python3-wheel ninja-build libavcodec-dev && \
+    update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-10 100 --slave /usr/bin/g++ g++ /usr/bin/g++-10 --slave /usr/bin/gcov gcov /usr/bin/gcov-10
 
 RUN pip3 install meson
 
 WORKDIR /tmp
 
-ENV LIBNICE_VERSION=0.1.17
+ENV LIBNICE_VERSION=0.1.18
 ENV LIBSRTP_VERSION=v2.3.0
-ENV JANUSGATEWAY_VERSION=v0.10.4
+ENV JANUSGATEWAY_VERSION=v0.10.9
 
 RUN \
     DIR=/tmp/libnice && \