update readme, x-forc-key in .env

.env.in

@@ -0,0 +1,2 @@
+CLOUD_CLIENT_TAG=
+FORC_API_KEY=

.gitignore

@@ -5,7 +5,7 @@ __pycache__/
 
 # C extensions
 *.so
-
+.env
 # Distribution / packaging
 .Python
 build/

README.md

@@ -21,9 +21,13 @@ source NameOfRcFile.sh
 ~~~
 
 #### Configuration
-You can view all existing parameters in the [yaml file](VirtualMachineService/config/config.yml).
+You can view (almost) all existing parameters in the [yaml file](VirtualMachineService/config/config.yml).  
 Also you need to provide the path to your config file as the first param when starting a server.
 
+Furthermore there are some parameters you can set in the [.env.in](.env.in) file, which are read only when starting with docker.  
+Important: You need to rename .env.in to .env in order for it to be read by docker.  
+When starting with commandline you will need to export some of them manually.
+
 #### Security Groups
 The client expects a security group with the name "defaultSimpleVM" to exist which will be assigned to each machine at startup. Also, each machine will have its own security group when it starts.
 
@@ -70,7 +74,7 @@ portal_client_start_server path/to/config.yml
 ~~~
 
 ### Using Docker
-Specify in the [.env](.env) file which release should be used by the client.
+Specify in the .env file which release should be used by the client.
 Then you can start the client with:
 ```
 $ docker-compose up

docker-compose.yml

@@ -13,6 +13,7 @@ services:
       - OS_PASSWORD
       - OS_USER_DOMAIN_NAME
       - OS_PROJECT_DOMAIN_ID
+      - FORC_API_KEY
 
     volumes:
       - ./VirtualMachineService/config/config.yml:/code/VirtualMachineService/config.yml