Additional hardening for Docker-Compose (#734)

docker-compose.yml

@@ -17,6 +17,12 @@ services:
       interval: 30s
       timeout: 5s
       retries: 2
+    user: "998:998"
+    read_only: true
+    security_opt:
+      - no-new-privileges:true
+    cap_drop:
+      - ALL
 
   nitter-redis:
     image: redis:6-alpine
@@ -30,6 +36,12 @@ services:
       interval: 30s
       timeout: 5s
       retries: 2
+    user: "999:1000"
+    read_only: true
+    security_opt:
+      - no-new-privileges:true
+    cap_drop:
+      - ALL
 
 volumes:
   nitter-redis: