Add env variable for which branch to use. Move CPU and RAM requirements to env so that only 1 docker-compose.yml example is needed.

Config/Hyperling.com/docker-compose.main.yml

@@ -0,0 +1,24 @@
+# 2022-10-29
+# Hyperling.com configuration.
+
+services:
+  app:
+    container_name: www-app
+    build:
+      context: ./
+      network: host
+    restart: always
+    ports:
+      - 8317:8080
+    environment:
+      - BRANCH=$BRANCH
+      - CPU=$CPU
+      - MEM=$MEM
+    volumes:
+      - ./files:/var/www/api/files
+    deploy:
+      mode: global
+      resources:
+        limits:
+          cpus: $CPU
+          memory: $RAM