✨ Adds agent secret support (#31)

* Set the Agent Secret environment variable

* Update portainer.sh

* Update README.md

* Update portainer.sh

* fixing the location of the export command

* Update run

* Update README.md

* 🔥 Revert unrelated changes

* 👕 Fix lint warnings

* 👕 Remove empty default value

* I failed at a rebase... need more coffee

Co-authored-by: Franck Nijhof <frenck@frenck.nl>

README.md

@@ -105,6 +105,11 @@ The private key file to use for SSL.
 
 **Note**: _The file MUST be stored in `/ssl/`, which is the default_
 
+### Option: `agent_secret`
+
+An option to set a shared agent secret. Must also be set in the remote agent
+as an Environment variable.
+
 ### Option: `leave_front_door_open`
 
 Adding this option to the add-on configuration allows you to disable

portainer/config.json

@@ -35,6 +35,7 @@
     "ssl": "bool",
     "certfile": "str",
     "keyfile": "str",
+    "agent_secret": "str",
     "leave_front_door_open": "bool?"
   }
 }

portainer/rootfs/etc/services.d/portainer/run

@@ -5,6 +5,11 @@
 # ==============================================================================
 declare -a options
 
+if bashio::config.has_value 'agent_secret' ; then
+    bashio::log.info 'Setting the Agent Secret'
+    export AGENT_SECRET=$(bashio::config 'agent_secret')
+fi
+
 bashio::log.info 'Starting Portainer...'
 
 options+=(--data /data)