improved documentation

README.md

@@ -24,6 +24,8 @@ version: "3"
 services:
   signal-cli-rest-api:
     image: bbernhard/signal-cli-rest-api:latest
+	environment:
+	  - USE_NATIVE=0
     ports:
       - "8080:8080" #map docker port 8080 to host port 8080.
     volumes:
@@ -31,6 +33,14 @@ services:
 
 ```
 
+## Native Image (EXPERIMENTAL)
+
+On Systems like the Raspberry Pi, some operations like sending messages can take quite a while. That's because signal-cli is a Java application and a significant amount of time is spent in the JVM (Java Virtual Machine) startup. signal-cli recently added the possibility to compile the Java application to a native binary (done via GraalVM).
+
+By adding `USE_NATIVE=1` as environmental variable to the `docker-compose.yml` file the native mode will be enabled. In case there's no native binary available (e.g on a 32 bit Raspian OS), it will fall back to the signal-cli Java application.
+
+## API documentation
+
 The Swagger API documentation can be found [here](https://bbernhard.github.io/signal-cli-rest-api/). If you prefer a simple text file like API documentation have a look [here](https://github.com/bbernhard/signal-cli-rest-api/blob/master/doc/EXAMPLES.md)
 
 In case you need more functionality, please **file a ticket** or **create a PR**.

docker-compose.yml

@@ -3,7 +3,7 @@ services:
   signal-cli-rest-api:
     build: "."
     environment:
-      - USE_NATIVE=1
+      - USE_NATIVE=0
       - PORT=8080
     ports:
       - "8080:8080" #map docker port 8080 to host port 8080.