harden docker-compose

docker-compose.yml

@@ -18,13 +18,47 @@ services:
     depends_on:
       - redis
       - signer
+    networks:
+      - proxitok
+    security_opt:
+      - no-new-privileges:true
+    cap_drop:
+      - ALL
+    cap_add:
+      - CHOWN
+      - SETGID
+      - SETUID
+
   redis:
     container_name: proxitok-redis
     image: redis:7-alpine
     command: redis-server --save 60 1 --loglevel warning
     restart: unless-stopped
+    networks:
+      - proxitok
+    user: nobody
+    read_only: true
+    security_opt:
+      - no-new-privileges:true
+    tmpfs:
+      - /data:size=10M,mode=0770,uid=65534,gid=65534,noexec,nosuid,nodev
+    cap_drop:
+      - ALL
+
   signer:
     container_name: proxitok-signer
     image: ghcr.io/pablouser1/signtok:master
+    networks:
+      - proxitok
+    user: nobody
+    read_only: true
+    security_opt:
+      - no-new-privileges:true
+    cap_drop:
+      - ALL
+
 volumes:
   proxitok-cache:
+
+networks:
+  proxitok: