Add build configuration and use it in docker compose.

.env

@@ -0,0 +1,2 @@
+BUILD_TARGET=jre # native, jre
+RUN_MODE=normal # native, normal

.gitignore

@@ -2,4 +2,4 @@ signal-cli-config
 src/main
 src/signal-cli-rest-api
 .idea/
-./persistence
+.persistence

docker-compose.yml

@@ -1,9 +1,13 @@
 services:
   # JRE variant (default) -- use with MODE=normal or MODE=json-rpc
   signal-cli-rest-api:
-    image: bbernhard/signal-cli-rest-api:latest
+     # image: bbernhard/signal-cli-rest-api:latest
+    build: 
+      context: "."
+      dockerfile: Dockerfile
+      target: ${BUILD_TARGET}
     environment:
-      - MODE=normal #supported modes: normal, json-rpc
+      - MODE=${RUN_MODE} #supported modes: normal, json-rpc
       #- AUTO_RECEIVE_SCHEDULE=0 22 * * * #enable this parameter on demand (see description below)
     ports:
       - "8080:8080" #map docker port 8080 to host port 8080.
@@ -19,4 +23,4 @@ services:
   #   ports:
   #     - "8080:8080"
   #   volumes:
-  #     - "./signal-cli-config:/home/.local/share/signal-cli"
+  #     - "./signal-cli-config:/home/.local/share/signal-cli"