Doc first start

doc/md/05-first_start.md

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+# First Start
+Now, we are ready to start !  
+In root, you can start directly HyperProxmox using the dedicated user.
+
+``` bash
+# Start & generate your key (root user/sudo)
+runuser -l hyperproxmox -c '/usr/bin/python3.5 /opt/HyperProxmox/code/scripts/main/startup.py'
+```
+
+You should have this output:
+``` bash
+No key found, auto-generation started ...
+```
+If you don't have this output, probably that you miss a task (delete old keys) in "Backend" page.
+
+``` bash
+Need a passphrase to start the generation:
+This action can take some minutes, please wait.
+Your new key has been generate ! 
+ - Private Key: private/keys/Ragnarok.pvt.key 
+ - Public Key: private/keys/Ragnarok.pvt.key
+You MUST save your passphrase hash in a security place !
+Start API server...
+http://127.0.0.1:8080/
+```
+
+Passphrase will be ask at each start.
+Without it, the privite key can be read and the access cannot be load in the memory.
+If you loose it, you must delete the keys and delete the different entries in the collection "clusters_conf" in mongoDB database.
+Currently there are not system to provide a full reset function. Use MongoDB shell to do it.
+
+
+
+
+[Config](04-configs.md) <-- Previous | Next --> [Usage - Logs](05-first_start.md)