Update Dockerfile

docker/code-analysis/Dockerfile

-FROM ubuntu:18.04
+FROM ubuntu:20.04
 
 LABEL maintainer="suru.dissanaike@iopsys.eu"
 LABEL build="docker build -t code-analysis ."
@@ -74,8 +74,8 @@ RUN mkdir /opt/dev
 RUN mkdir /etc/config
 
 # install node
-ENV NODE_VERSION=12.14.1
-RUN curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.34.0/install.sh | bash
+ENV NODE_VERSION=14.16.1
+RUN curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.38.0/install.sh | bash
 ENV NVM_DIR=/root/.nvm
 RUN . "$NVM_DIR/nvm.sh" && nvm install ${NODE_VERSION}
 RUN . "$NVM_DIR/nvm.sh" && nvm use v${NODE_VERSION}
@@ -210,19 +210,6 @@ RUN \
       wget https://github.com/pmd/pmd/releases/download/pmd_releases%2F6.19.0/pmd-bin-6.19.0.zip && \
       unzip pmd-bin-6.19.0.zip
 
-# libwebsockets
-RUN \
-     cd /opt/dev && \
-     git clone https://github.com/warmcat/libwebsockets.git && \
-     cd libwebsockets && \
-     git checkout 89eedcaa94e1c8a97ea3af10642fd224bcea068f && \
-     mkdir build && \
-     cd build && \
-     cmake .. -DCMAKE_SKIP_RPATH=TRUE -DLWS_IPV6=ON -DLWS_WITHOUT_TESTAPPS=ON -DLWS_WITH_SSL=ON -DLWS_OPENSSL_CLIENT_CERTS=/etc/ssl/certs -DLWS_OPENSSL_SUPPORT=ON -DLWS_WITH_SSL=ON -DLWS_WITH_LIBUV=ON -DLWS_WITH_PLUGINS=ON -DLWS_WITH_SERVER_STATUS=ON -DLWS_WITH_ACCESS_LOG=ON -DLWS_WITH_CGI=ON && \
-     make && \
-     sudo make install && \
-     sudo ldconfig
-
 # microxml
 RUN \
 	cd /opt/dev && \