make Docker Compose use PORT for --allow-net flag

Otherwise we get error like this:

error: Uncaught (in promise) PermissionDenied:
Requires net access to "0.0.0.0:8900", run again with the --allow-net flag

Signed-off-by: Jakub Sokołowski <jakub@status.im>

Dockerfile

@@ -13,4 +13,6 @@ RUN deno cache deps.ts
 COPY . .
 RUN deno cache main.ts
 
+ENV PORT=8080
+
 CMD ["run", "--allow-env", "--allow-net=:8080,discord.com", "main.ts"]

docker-compose.yml

@@ -8,6 +8,12 @@ services:
     env_file: .env
     environment:
       HOSTNAME: "0.0.0.0"
+      ADDR: "${ADDR:-127.0.0.1}"
       PORT: "${PORT:-8080}"
     ports:
       - '${ADDR:-127.0.0.1}:${PORT:-8080}:${PORT:-8080}'
+    command:
+      - run
+      - --allow-env
+      - --allow-net=:${PORT},discord.com
+      - main.ts