ajout Dockerfile server

Dockerfiles/server/Dockerfile

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+# Choosing the image to use
+FROM node:alpine
+
+# Installing required libraries
+RUN apk add npm && \
+    mkdir server && \
+    cd server && \
+    npm install express && \
+    npm install yargs && \
+    npm install systeminformation && \
+    wget http://homepages.laas.fr/smedjiah/tmp/server.js
+
+# set entry point for emulator gatekeeper (needed for compatibility with vim-emu datacenters)
+#ENV VIM_EMU_CMD "node /server/server.js --local_ip '127.0.0.1' --local_port '8080' --local_name 'srv'" #uncomment when on ContainerNet datacenter
+#ENV VIM_EMU_CMD "TODO at startup"
+#ENV VIM_EMU_CMD_STOP "TODO at shutdown"
+
+# CMD should always point to /bin/bash to not block the emulator (sh for node:alpine)
+CMD node /server/server.js --local_ip '127.0.0.1' --local_port '8080' --local_name 'srv' #comment when on ContainerNet datacenter
+#CMD /bin/sh #uncomment when on ContainerNet datacenter