Update container permissions to read-only

Author: NutsaB

scripts/testing/docker-compose_otel-collector.yaml

@@ -25,6 +25,9 @@ services:
       - "8889:8889"   # prometheus exporter
     networks:
       - monitoring
+    read_only: true
+    tmpfs:
+      - /tmp:mode=666
 
   prometheus:
     image: prom/prometheus:latest
@@ -43,6 +46,9 @@ services:
       - monitoring
     depends_on:
       - otel-collector
+    read_only: true
+    tmpfs:
+      - /tmp:mode=666
 
   victoriametrics:
     image: victoriametrics/victoria-metrics:latest
@@ -60,3 +66,6 @@ services:
       - monitoring
     depends_on:
       - prometheus
+    read_only: true
+    tmpfs:
+      - /tmp:mode=666